Click here to Skip to main content

Submit your article

WinAPI

WinAPI

Great Reads

Dark Corners and Pitfalls of C++

by SimbirSoft

C++: love and intrigue

Using the Windows Photo Import API - Windows.Media.Import

by Axel Rietschin

Import photos & videos directly from smart phones and digital cameras using the Windows Photo Import API, for Windows Universal Apps and Classic Win32 applications on Windows 10 and beyond.

Check It Out 2.0, One Step Win32 SDK C Checked Combo and List Boxes

by David MacDermot

This article describes adding checkboxes to the standard combobox and listbox control.

The Kernel-Bridge Framework

by Alexander Eremeev

The Windows kernel-hacking library and development framework written on C++17

Latest Articles

RGFW | Singler-Header Lightweight Framework for Basic Window and Graphics Context Handling (like GLFW)

by ColleagueRiley

A multi-platform single-header very simple-to-use framework library for creating GUI Libraries or simple GUI programs.

Free Gamma: Precisely Calibrate Your Display

by AbdulRahman A. Badry

Alter your display gamma-ramp to correct & calibrate it

Check It Out 2.0, One Step Win32 SDK C Checked Combo and List Boxes

by David MacDermot

This article describes adding checkboxes to the standard combobox and listbox control.

Understanding Windows Message Queues for the C# Developer

by honey the codewitch

Diving into some of the core plumbing behind the Windows operating system

All Articles

WinAPI

64 bit dot net process created with createprocessasuserw exits immediately with exception code 0xc06d007e on windows 7 64 bit

20 Nov 2018 by Sagar R. Kapadia

I have a C# Application, which is launched from a C++ DLL using CreateProcessAsUserW api. The process is launched successfully, but terminates immediately. It works properly on Windows 10 [both as 32 bit and 64 bit] and 32 bit on Windows 7. Please help. Thanks, Sagar The method is as follows ...

64 bit dot net process created with createprocessasuserw exits immediately with exception code 0xc06d007e on windows 7 64 bit

6 Nov 2018 by KarstenK

You havent written about the user rights which gets the process. It should be a valid user on the machine who has all needed rights on the machine. Check with manual start of the app, when logged on as this user. When the error only is on Windows 7 x64 it can be a bug somewhere in the...

64 bit dot net process created with createprocessasuserw exits immediately with exception code 0xc06d007e on windows 7 64 bit

20 Nov 2018 by Sagar R. Kapadia

I got the answer on https://social.msdn.microsoft.com/Forums/vstudio/en-US/fb9d15fb-dc9f-488e-92c4-e0bb438442e1/64-bit-dot-net-process-created-with-createprocessasuserw-exits-immediately-with-exception-code?forum=vcgeneral [RLWA32 answered it] There was a problem with the way in which the...

[Asm] how to see if a region of memory is executable?

8 Oct 2022 by reverser69

hi all i want to do an inline asm and i want to see if a given location of memory is non-writable-executable code or its writable data; if its data, skip the overwrite. i want to do it in pure asm + win api. i partially achieved it by checking...

[Asm] how to see if a region of memory is executable?

8 Oct 2022 by merano99

Access to main memory is usually realized with an MMU. Since the MMU is a critical resource, the operating system takes care of it. Access to the MMU requires operating system rights and good hardware knowledge. If you had access to the MMU, you...

[C++]Need help fixing

29 Aug 2015 by OriginalGriff

That isn't how it works here: we aren't a debugging service for random people.But you almost certainly have the greatest tool for doing it yourself on the planet open right now: Visual Studio.Debugging is a skill, and it's one you only improve by practicing it - you certainly won't develop...

Add button to the tab ( like in Firefox )

28 Dec 2014 by AlwaysLearningNewStuff

I want to create tab control that has button inside it's tab. Something like this[^] image.Tab has close button added and I need something like this. I also have to enable Visual Styles.English is not my native, so I was not able to formulate efficient search criteria for Google. I found...

Add button to the tab ( like in Firefox )

28 Dec 2014 by Maciej Los

I'm sure you can find what you need on CP KnowledgeBase[^].Here you've got two articles:TabCtrl[^]Custom Tab Controls, Tabbed Frame and Tabbed MDI[^]

Adding a function to a DLL file.

27 Mar 2024 by Rick York

Firstly, there are no limits to DLL sizes or capacities. Secondly, it is important to note what is emitting that error message. It could be the compiler or the linker. If it is from the compiler then you have not defined a prototype for the...

Adding a function to a DLL file.

27 Mar 2024 by samtoad

Currently, I'm trying to add another "C" routine into a DLL file. I've made the routine inside a DLL source file. I've declared the routine, and also indicated the intentions as it will be exported. The function name is also included in a DEF...

Adding a function to a DLL file.

28 Mar 2024 by KarstenK

Verify that your new dll function has the same export macro signature as the other dll function. Mostly some DLL_EXPORT or similar macro stuff. Another common issue is that, your new dll isnt used by the calling program but a stale version in...

Asynchronous readdirectorychangesw call blocks the thread from exiting

31 Oct 2016 by MyOldAccount

INTRODUCTION:I am writing small app that monitors certain directory for newly added files.I would like to put monitoring code in a separate thread, so I can leave main thread free for other stuff, and cancel monitoring thread when I need to.RELEVANT INFORMATION:I am using...

multi-threading

Asynchronous readdirectorychangesw call blocks the thread from exiting

31 Oct 2016 by Jochen Arndt

I have not used ReadDirectoryChanges so far but it should be sufficient to call it only once outside the loop. That should solve the problem.If not, you have to wait for both events using a single call. But I recommend to do that anyway:HANDLE ahWait[2] = { p.hEvent, ovl.hEvent };BOOL...

multi-threading

Block all windows messages to a window(Make a window disappear)

17 Nov 2014 by Sergey Alexandrovich Kryukov

Short answer: you may need to use Windows Hooks.The problem with this question is that you apparently refuse to collaborate. You should understand that using P/Invoke and direct use of Windows messages is unusual in most reasonable application and only used in some special cases. We need to...

C# / VB.NET / C++ CLI and WinAPI: How to Programmatically Press Mouse Button, and Check if Mouse Button or Keyboard Key Pressed

29 Sep 2014 by Emiliarge

Using WinAPI functions - GetAsyncKeyState and mouse_event

C# send windows messages to a networked computer

6 Jan 2015 by MasterCodeon

hello everyone!i want to know how to:A. start a process on a remote machine directly without using a client app.B. send WinAPI messages from the local workstation to the process i just on the remote pci know how to send messages to an app on the local machine but i don't know how to send...

C# send windows messages to a networked computer

5 Jan 2015 by Jeremy Falcon

Assuming you're not trying to write a virus...What you're asking for is impossible without a receiver program on the remote machine. Nowhere does Windows automatically process sockets and execute them as a Windows API call. You'd need a program to receive the packets and them process...

C# send windows messages to a networked computer

5 Jan 2015 by Dave Kreskowiak

1) You can launch a remote process using WMI, but it can NOT be an interactive process. This means that the user logged into the console will NOT see it running at all. For example, you can launch Notepad, but it'll sit there waiting for input it'll never get and the user will not see it.2)...

C# Use SendMessage Function To Send A String To Another Appliaction

30 Dec 2014 by Zoltán Zörgő

1) Your P/Invoke looks incorrect. 2) If you want to send cutom message, use WM_USER+X[^], which start from 0x0400 and not 40 decimal.3) ParentFormHanlde??? It looks not an other window's handle to me... 4) Look here for a working sample (even the message is other):...

C# Use SendMessage Function To Send A String To Another Appliaction

31 Dec 2014 by MasterCodeon

All right i did it yeah!some background info on this question:i was trying to setup an options box for my form and i wanted to pass string values betweenmy main app and the options app. so i tried the properties approach but it wouldn't work, this was due to the fact that i was declaring...

C# Use SendMessage Function To Send A String To Another Appliaction

17 May 2023 by MasterCodeon

hello everyone!i am trying to send a string to another application.the way i am trying to do this is by using the SendMessage function in the windows api, and i am setting the WParam parameter to a string value(when i imported the function i did use a string type for this parameter).now in...

C++ glteximage2d not working with int array

20 Apr 2023 by huguidesr

I've been trying to draw a bitmap int array using glTexImage2D, but it only outputs white nothingness. It outputs jumbled messy pixels from out of bounds memory if I initialize the int aray as a char array instead, but it only renders whiteness...

C++ glteximage2d not working with int array

20 Apr 2023 by Rick York

I don't have an answer for you but here are a few sample projects you might get a hint from : 50 OpenGL Win32 Projects in One[^] 50 OpenGL MFC Projects in One[^] Your Own Quadrics in OpenGL MFC[^]

C++ how to get pixel color from outside my application window ?

25 Mar 2023 by OriginalGriff

You can use GetDC on the NULL window to get a device context for the whole screen, and can follow that up with a call to GetPixel: HDC dc = GetDC(NULL); COLORREF cr = GetPixel(dc, x, y); ReleaseDC(NULL, dc);

C++ how to get pixel color from outside my application window ?

26 Mar 2023 by Saleh 2023

I am trying to get the pixel color of a specified coordinate point outside my application window. So, since hwnd specifies my window to be targeted, then all i should do is use getdc function and pass my hwnd as parameter. But what if I want a...

C++ question about routine in winforms

11 Jun 2017 by User 11061201

Hallo, i am not sure where to start my code in C++ using winforms. There is no main() procedure, instead there is a WinMain() procedure, so where exactly to put my code and where not. Where is the loop? I want to add; while(1) {... call another method;} int WINAPI WinMain (HINSTANCE...

C++ question about routine in winforms

11 Jun 2017 by OriginalGriff

Winforms isn't like a console app, there is a "main" proc, but it's not where you put most of your code (if any). And there isn't a loop in the sense you mean! Instead it's job it to process Windows messages, and call the appropriate function when a particular message is received - and it...

C++ question about routine in winforms

11 Jun 2017 by Richard MacCutchan

See EFNet #Winprog[^] and Win32 Programming - FunctionX[^] for some useful tutorials.

C++ question about routine in winforms

11 Jun 2017 by User 11061201

I ended up creating some events, im not sure if is the way to use in C++ but good for some testing. bool onLoad; void on_Load(); bool onClosing; void on_Closing(); LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { if(onLoad == false) { ...

C++ WinAPI Wrapper Object using thunks (x32 and x64)

6 Dec 2016 by Jon Campbell

Using "thunk" technique to add this pointer as fifth parameter to WndProc call for x32 and x64

Calculate ideal font size, based on the paper size and maximum allowed text length

28 Jun 2014 by AlwaysLearningNewStuff

I have printing code that draws grid on the paper.Grid has 4 columns, and they have equal horizontal length. Height of the cell is tenth of the paper size. Total number of rows is unknown but I know for a fact that there will be at least one row.Each cell has same physical size-> width...

Calculate ideal font size, based on the paper size and maximum allowed text length

29 Jun 2014 by CPallini

Quote:The only thing that crossed my mind was to create "dummy font", see if the example text can fit into cell, and then adjust it's size if the test failsThat's a feasible approach indeed. But what do you mean with 'dummy' font? You need to know in advance the exact font you are going to use,...

Calculator Interface Design In Rust Language

15 Dec 2016 by Farhad Reza

This tip describes how we can design application interface using Win32 API in Rust Programming language.

Can I open two or more .chm files in the same process?

1 Feb 2022 by Avtem

So for my Win32 app I use one .chm file as a manual and another .chm for representing "Version History." I use a HtmlHelpW() function for opening them. The problem is, if I open both of them, the second .chm file hangs up, starts to consume all...

Can I open two or more .chm files in the same process?

1 Feb 2022 by CHill60

If you want spaces in a path then you must surround the entire path with double quotation marks - see Long paths with spaces require quotation marks - Windows Server | Microsoft Docs[^] E.g. HtmlHelpW(mainWnd,...

Can I pass an IntPtr to a method ?

15 May 2014 by Tony Hallett

Hi, I have been writing some Pinvoke code for lower level WinAPI Access Control functions. I have a pointer to Privileges associated with my access token from the TOKEN_ACCESS_INFORMATION and I am looking at the privileges. I have working code but decided to refactor part of it to a...

Can not properly center child dialog box into tab control

28 Nov 2014 by AlwaysLearningNewStuff

I have dialog box which should act as tab page. My application uses Visual Styles.I ran into background painting problem when tried to properly center child dialog box into tab's display area. Asking for help, I got an advice to resize the child dialog box to fit the tab control's entire...

Can someone recommend a video library to read video info ?

14 May 2023 by Mitchell J.

ffmpeg should be able to do this. Not sure if it supports directly embedding itself within your C++ code, but you should at least be able to run an instance of the binary from your code (with the correct flags) and then parse the output it produces.

Can someone recommend a video library to read video info ?

14 May 2023 by OriginalGriff

This isn't necessarily a C++ solution - I haven't played with C++ for over a decade - but there is a .NET way to get some video info direct from the OS provided a suitable codec is installed - I use it to get video duration and resolution, using...

Can someone recommend a video library to read video info ?

14 May 2023 by KarstenK

So Derell wrote the ffmpeg is a solution. You have to learn to handle the code, but it has a lot of features and it is some "workhorse" library. Your tasks are challengig so it is also challenging to get some library to do the job. tip: the...

Can someone recommend a video library to read video info ?

15 May 2023 by RickZeeland

Maybe you can use one of these GitHub projects: video-metadata · GitHub Topics · GitHub[^] And if you are not afraid of a bit C# coding: GitHub - drewnoakes/metadata-extractor-dotnet: Extracts Exif, IPTC, XMP, ICC and other metadata from image,...

Can someone recommend a video library to read video info ?

16 May 2023 by virtualnik

Try MediaInfo: MediaInfo - Download MediaInfo for Microsoft Windows[^] It ships with a simple to use Dll interface that can be used to gather information about nearly all video and audio files. In the Zip-File you will find a directory called...

Can someone recommend a video library to read video info ?

17 May 2023 by Derell Licht

I have a command-line utility that I wrote (C++, MinGW32, Windows 10), that displays information for images and videos... I recently found an excellent free library (ZPlay) that handles some of the more complex images such as OGG, MP3, FLAC... ...

Can someone recommend a video library to read video info ?

17 May 2023 by cute_friend7077

crystalhd gstreamermm libmatroska libVLC mjpegtools OpenH264

Can't reposition page (child dialog box) to fit tab control's display area

12 Nov 2014 by AlwaysLearningNewStuff

I am trying to insert dialog boxes, as separate pages, into tab control.I have created the dialog boxes successfully in resource editor, with all necessary styles.Since my application uses visual styles, I ran into problem with transparency of the dialog's child controls ( radio button,...

Can't reposition page (child dialog box) to fit tab control's display area

12 Nov 2014 by barneyman

from some distant memory of this, try doing the adjustRect and child movewindow AFTER the insertion ... the tab control changes size ISTRBTW, you'll have to do an adjustRect, movewindow for all children after each insert (or once after a block insert), because the tabControl header resizes...

Capturing Live-video from Web-camera on Windows 7 and Windows 8

24 May 2015 by Evgeny Pereguda

Simple lib for capturing live-video from web-camera by using Media Foundation

Capturing wrong part of the screen

8 Jul 2020 by MyOldAccount

I have created a small demo app which window looks as below: https://i.stack.imgur.com/iW05q.png[^] When I run this demo app, and press any key, I want to capture the part of the screen bitmap. The part of the screen I am interested in, is the...

Capturing wrong part of the screen

8 Jul 2020 by Dave Kreskowiak

It's capturing exactly what your code is telling it to capture. You have no choice but to run this code under the debugger, examining variables to make sure the values are what they are supposed to be. The code isn't doing what you think it's...

Capturing wrong part of the screen

8 Jul 2020 by Richard MacCutchan

See GetScaleFactorForMonitor function (shellscalingapi.h) - Win32 apps | Microsoft Docs[^].

Capturing wrong part of the screen

8 Jul 2020 by KarstenK

You should respect the scaling how Richard wrote and also deal with multi monitor system. Some years ago I wrote an Repositioning Windows on Multiple Monitor Systems article which deals with that issue. But nevertheless your foo function looks...

Cclientdc and dc not drawing on chtmleditctrl

22 Mar 2016 by Ashiru Ali

Hi all I am working with a CHtmlEditCtrl in MFC. I want to draw some random rectangles and lines inside a function handling right click event.What I have tried:The ChtmlEditCtrl control is created from static using this snippet: bool CHtmlEditCtrlEx::CreateFromStatic( UINT nID,...

Cclientdc and dc not drawing on chtmleditctrl

22 Mar 2016 by KarstenK

Your drawing code belongs in the OnPaint() function. At first make the default call and than your stuff.void CHtmlEditCtrlEx::OnPaint(){ CWnd::OnPaint(); //here comes your drawing code DrawSquigly(...);}For controlling the drawing you should use a member variable activated...

Change DateTimePicker style on combobox selection fails

25 Jan 2015 by AlwaysLearningNewStuff

I am trying to change the style and date format of the DateTimePicker control on combobox' CBS_SELCHANGE notification.When user selects one option, datetime picker should have spin control and show only year. If user selects other options, style should be reset to short date style and date...

Change DateTimePicker style on combobox selection fails

25 Jan 2015 by KarstenK

Richard is right, that some style in controls cant be changed in runtime, but must initialized in creation time.You can work around it with a) dynamically recreating such control behavior, or b) create 2 controls in the same place and only one is visible and the other is hidden. It...

Changing ProcessHandle access-rights.

26 Nov 2014 by Member 11142020

What API can I use to change the access-rights of a handle I have opened?I want to change the access rights of it on the run, I heared it's possible without creating a new handle, so how?

Changing ProcessHandle access-rights.

26 Nov 2014 by barneyman

SetSecurityInfo[^] possibly?

Check It Out 2.0, One Step Win32 SDK C Checked Combo and List Boxes

23 Dec 2021 by David MacDermot

This article describes adding checkboxes to the standard combobox and listbox control.

Client and server can not exchange data because both get “stuck”

22 Aug 2016 by MyOldAccount

INTRODUCTION:I have studied the MSDN examples for blocking TCP server[^] and blocking TCP client[^].I wanted to try something simple, in view of modifying those examples to create simple chat application.I have tried to implement the following, for a start:send message from...

Client and server can not exchange data because both get “stuck”

22 Aug 2016 by Jochen Arndt

You are using blocking sockets. When receiving and there are no more data, the recv function will block (not return) until new data are received or the connection is closed (as triggered with your third try).The simplest method to avoid this is using some kind of indication that all current...

Closing child window and it's process when parent process crashes

26 Oct 2014 by time-killer-games

I am creating a process whose main window is then embedded in the calling process' main window by removing the window border, MoveWindow, and SetParent.I can use TerminateProcess to close the process of the embedded window when the calling process is closed properly, but if the calling...

Closing child window and it's process when parent process crashes

26 Oct 2014 by enhzflep

Something you could consider doing, is to implement a regular checking mechanism. The child process would check if the HWND of its parent is a valid HWND. You could set a timer that fired as often as required.You could use something like the following: case WM_TIMER: ...

Common controls are not properly painted when I resize window

23 Nov 2014 by AlwaysLearningNewStuff

INTRODUCTION:I am creating tab control with child dialog boxes as pages.I have Visual Styles enabled via #pragma comment. I have also called InitCommonControlsEx and #pragma comment( lib, "comctl32.lib" ) as well.Initially, when window loads, dialog and its common controls have...

Common controls are not properly painted when I resize window

23 Nov 2014 by Richard MacCutchan

InvalidateRect( hwnd, NULL, FALSE );You should use TRUE in the bErase (third) parameter, to ensure the background is erased and completely repainted.

Comparison of User Mode and Kernel Mode Applications for Modifying HTTP Traffic

7 Nov 2018 by Apriorit Inc, gamapat

Take a look at how to intercept HTTP traffic in order to inject custom code into Windows HTML markup

Control an app from another application for voice commands

2 Aug 2020 by Amit Saini

Hello Everyone ,My motive is to control visual studio by voice commands by using microsoft speech services. I want to control visual studio from my another window form app in c#. I have a little bit success but there is some problem in SendKeys...

Convert events from a USB human interface device using C++

1 Jul 2015 by George Netu

I have a USB HID touchpad that collects input. By default, when I press on the touchpad it generates carriage return (Enter) and when I try to use it as a mouse it actually enters a dragging state.What I want to do is to convert the carriage return into a mouse click event and the dragging...

Convert printable area of the paper, obtained by GetDeviceCaps, into RectF

14 Jun 2014 by AlwaysLearningNewStuff

I am learning to use print property sheet so I can start learning printing by drawing a rectangle on the paper.My problem is that I do not have a printer, and am testing the results by printing to XPS file and MS Office OneNote 2007. I am drawing the rectangle with this code snippet ://...

Convert printable area of the paper, obtained by GetDeviceCaps, into RectF

16 Jun 2014 by Richard MacCutchan

Take a look at GDI Drawing and Printing[^].

Convert printable area of the paper, obtained by GetDeviceCaps, into RectF

16 Jun 2014 by Richard MacCutchan

I have discovered that the issue is to do with the default unit settings in the Graphics class, as described in http://msdn.microsoft.com/en-us/library/ms535812(v=vs.85).aspx[^]You need to use the following line of code to set it to pixels.g.SetPageUnit(UnitPixel);That now works in XPS...

Copy text from the grid to editor tabular text columns not preserved

18 Feb 2019 by lbernstein123

User is facing problem copying text from my application grid into another application text editor (to be specific - app on the receiving site is Bloomberg IB Chat) - text columns not aligned properly. You can see my code - this works on plain text editors such as notepad, notepad++. I think it...

Copy text from the grid to editor tabular text columns not preserved

18 Feb 2019 by Gerry Schmitz

Text is text. The "font" (e.g. mono, size, weight, etc.) is controlled by the receiver / document / "container" / email client / browser / font availability. Unless there are features to allow for pasting "as is" (like for mono), the stuff gets which ever font the OS "thinks" is closest for a...

Copy text from the grid to editor tabular text columns not preserved

18 Feb 2019 by lbernstein123

Gerry thanks. I understand your point. However, posting a question I thought maybe there are some people in the community who are done something like: 1. Set global hook to paste function. 2. Detect the font family of the window that receives paste result. 3. Figure out how to align data based...

Could not change cursor in edit control

30 Sep 2019 by Member 11803607

I SubClassed The Edit Box In Window Class #32770 And Want To Change The Cursor But Cannot do SetCursor LoadCursor(0,IDC_HAND) What I have tried: Just Put Api function that mentioned in WM_SETCURSOR

Creating remote desktop in WINAPI C++

26 Dec 2016 by Member 12890174

Hello and Good Morning to everyone Studied about screen capture / mouse capture so i wanted to ask how do i create a Remote desktop application in WINAPI with these api ?Any ideas?What I have tried:screen capture + mouse capture

Creating remote desktop in WINAPI C++

23 Dec 2016 by barneyman

Writing a Desktop Sharing Application – Enterprise Mobility and Security Blog[^]

Creating remote desktop in WINAPI C++

26 Dec 2016 by zeki yugnak

Hi, you may want to look existing applications such as tight vnc etc. It has been implemented with pure Win32Api/C++, and you can review it's open source codes just downloading their website. Writing remote application is a very long road, and you need learn a lot of thing on this road, good...

Creating window frame without maximize button and without resizing options?

10 Dec 2014 by AlwaysLearningNewStuff

I need to create a window that acts like "normal" one, but without maximize button, and sizing border.Searching through Internet, and studying MSDN, I have learned that natively achieving both is impossible.There is no window style that does both ( I can disable maximize button, but that...

Creating window frame without maximize button and without resizing options?

10 Dec 2014 by Richard MacCutchan

Searching through Internet, and studying MSDN, I have learned that natively achieving both is impossible.Not true at all, just use WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_DLGFRAME | WS_MINIMIZEBOX styles in your CreateWindow or CreateWindowEx call.

Dark Corners and Pitfalls of C++

15 Aug 2019 by SimbirSoft

C++: love and intrigue

Date and time picker with Visual styles enabled-> change background color of the title

13 Feb 2015 by AlwaysLearningNewStuff

I have enabled Visual styles for my application:#pragma comment( linker, "/manifestdependency:\"type='win32' \ name='Microsoft.Windows.Common-Controls' version='6.0.0.0' \ processorArchitecture='*' publicKeyToken='6595b64144ccf1df' \ language='*'\"")I can set font for the...

Detect changes in user locale setting (Control Panel -> Clock,Language and Region) in child dialog box

2 Feb 2015 by AlwaysLearningNewStuff

I have dialog box made in resource editor that behaves as a child control of the main window.In normal mode, when behaving as a popup, dialog can receive WM_SETTINGCHANGE[^] message that notifies dialog box about user changing locale settings, but as a child it does not seem to receive this...

Detect changes in user locale setting (Control Panel -> Clock,Language and Region) in child dialog box

11 Feb 2015 by KarstenK

You must forward the message in your app. Post it with the same parameters to your actual window and handle it in a message handler.

Detect when scrolling is necessary while user drags listview items

2 Mar 2015 by AlwaysLearningNewStuff

INTRODUCTION:I am implementing rearranging of listview items without using OLE drag and drop.PROBLEM:I have successfully solved most of this task, except scrolling up/down when user wants to drop items at the position that is not currently visible.QUESTION:I am able to scroll...

Detect when scrolling is necessary while user drags listview items

2 Mar 2015 by Jochen Arndt

CView derived classes are prepared for drag & drop.To register a window as a drop target, add a COleDropTarget member to your class and call the Register() function passing the CWnd pointer to the window. The common place to do this is OnInitialUpdate() with view windows:void...

Difference between the keyboard hooks(WH_KEYBOARD and WH_KEYBOARD_LL)

7 Apr 2020 by Coder969

I want to understand which hook is used for what purpose. What I have tried: I have googled and only difference I understood is WH_KEYBOAD will inject the dll into the processes but for the WH_KEYBOAD_LL windows will make a direct call to call back function without injecting the dll. So...

Difference between the keyboard hooks(WH_KEYBOARD and WH_KEYBOARD_LL)

16 Sep 2019 by Richard MacCutchan

It is all described at Hooks Overview - Windows applications | Microsoft Docs[^].

Difference between the keyboard hooks(WH_KEYBOARD and WH_KEYBOARD_LL)

7 Apr 2020 by Member 10779791

how i can trace application name or browser url where typing something?? Example if i a\m typing on word then it will return word if it will a exe file then exe file name?? Any suggestion Thankls in Advance

Does my C++ program work in all Microsoft windows versions

25 Dec 2016 by Member 10852608

Helloso let's say i wrote simple win32 api application with simple GUI .. does it work in the following version of windows {XP ,Vista,7, 8/8.1,10 (32bit & 64bit)} ? i had little problem running it in xp version but i set it to Visual Studio 2015 - Windows XP (v140_xp)does this option...

Does my C++ program work in all Microsoft windows versions

25 Dec 2016 by Jochen Arndt

There is theoretically no difference. But this assumes that all systems use identical hardware.There may be differences when changing the project CPU settings (minimum supported CPU) and there are differences between 32 and 64-bit builds. But these are negligible.Setting the minimum...

Does my C++ program work in all Microsoft windows versions

25 Dec 2016 by KarstenK

Normally the problem point of actual Windows versions is Windows XP (32 bit). If it works on that, everything should be fine. The speed isnt a real issue because the difference are very small. The best optimization is to minize the drawing process, reloading app resource (like bitmaps) and the...

Dump current process memory

13 May 2014 by Viacheslav Kukhta

Hi, prompt please how i can create dump heap? What functions should be used to receive the dump heap?

Dump current process memory

13 May 2014 by Code-o-mat

This is probably what you are looking for: MiniDumpWriteDump[^], good luck.Please note that creating full memory dumps might take a longer time and it might create quite a large file, so handle with care.

Dump current process memory

13 May 2014 by Viacheslav Kukhta

I try.. but nothing is written to the filecase IDC_BUTTON2:hFile = CreateFile( TEXT("minidump.dmp"), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL ); if( hFile!=NULL && hFile!=INVALID_HANDLE_VALUE ) { MINIDUMP_EXCEPTION_INFORMATION eInfo; ...

Dynamically adjust the width of combobox so the entire string can be shown

8 Dec 2014 by AlwaysLearningNewStuff

I am using a combobox control to show names stored in a database ( I need to preserve space, that is why I use it instead of a listview, for example ).My problem is that sometimes text is longer than the combobox so part of it can not be seen.Is there a way to resize combobox' listbox so...

Dynamically adjust the width of combobox so the entire string can be shown

8 Dec 2014 by nirav raval

Adjust combo box drop down list width to longest string width[^]Please check the above link.Tip : Always search before posting a question. It will help you a lot.Regards,

Edit control doesn't show characters properly after keyboard layout is changed

29 May 2014 by AlwaysLearningNewStuff

I have made simple edit control. After I change keyboard layout from English to other one, characters are not shown properly. They are represented with a pipe ( | ).If I copy the content of the edit control and paste it into Notepad they are displayed properly.I have tried to register...

Edit control doesn't show characters properly after keyboard layout is changed

31 May 2014 by AlwaysLearningNewStuff

After adding the following code snippet into my WM_CREATE handler I found out that edit control uses System font :HFONT hf = (HFONT)SendMessage( hEdit, WM_GETFONT, 0, 0 );HDC eDC = GetDC( hEdit );wchar_t txt[50];GetTextFace( eDC, 50, txt );SetWindowText( hEdit, txt...

Elevated Privileges through command line in windows

28 Jul 2014 by Muhammad Muddasar Yamin

The article is about launching elevated processes through command line

Elevating the duplicated token of a standard user

6 Oct 2020 by curiousward

I have retrieved and duplicated a token (via OpenProcessToken() and DuplicateTokenEx() ) from a process running under the context of a Standard User. Is it possible to provide this token alone with administrative privileges so that such user...