C / C++ / MFC

Re: How to update CListBox

15-May-09 2:17

Your UI looks frozen because the message pump is blocked doing calculations. You must do your calculation in a separate thread[^] and post a User defined message[^] to the main window and handle the message to update your list box.

It is a crappy thing, but it's life -^ Carlo Pallini

S. Senthil Kumar16-May-09 9:26

S. Senthil Kumar

16-May-09 9:26

Rajesh R Subramanian wrote:
You must do your calculation in a separate thread[^] and post a User defined message[^] to the main window

Just an interesting aside - I ran into this a couple of days ago. Rather than define a custom user message for each individual action that must occur on the UI thread, I tried to do it the .NET way - define a single message, say WM_INVOKE, and pass a pointer to a member function as LPARAM when posting the message (like Control.Invoke). Unfortunately, C++ doesn't allow you to take a pointer to a member function of an instance object directly - you can get a pointer to a member function, but you'll have to track the instance yourself and then when calling, use the esoteric .* operator to invoke it.

I couldn't be bothered to write a separate struct to hold the instance pointer and the function pointer, so I ended up writing multiple user defined messages instead Smile | :)

Regards
Senthil [MVP - Visual C#]
_____________________________
My Home Page |My Blog | My Articles | My Flickr | WinMacro

Re: How to update CListBox

krmed15-May-09 7:06

krmed

15-May-09 7:06

After you do your addstring, call UpdateWindow:

clistbox.addstring(xxxxx);
clistbox.UpdateWindow();

Good luck.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

How to know the width and height of an Image?

kapardhi15-May-09 1:22

kapardhi

15-May-09 1:22

Hai!

I have byte array of an image (Image can be .bmp or .jpg or .jp2) Now how can i know the width and height of the image present in byte array?

Thanks!

Re: How to know the width and height of an Image?

Madhu Nair15-May-09 1:43

Madhu Nair

15-May-09 1:43

kapardhi wrote:
the width and height of the image present in byte array?

From a CBitmap object ? Its written here[^]

Re: How to know the width and height of an Image?

C^hris L^osinger15-May-09 4:20

C^hris L^osinger

15-May-09 4:20

BYTE *pImage = new BYTE[4000];

there is no width and height of a byte array.

if the byte array holds image pixels, then whoever gives you the byte array will also have to tell you the image dimensions.

if the byte array holds an encoded image file, then you will have to decode/parse the format.

image processing toolkits | batch image processing

How to insert image in Menu bar

AnithaSubramani14-May-09 22:40

AnithaSubramani

14-May-09 22:40

Hi friends,
In my project i created Menu on design time itself.I tried to insert the image in sub menu.I cant get result.Please any body give me ur idea to insert the image in menus.

Language ->Main menu
Sub menu:
English
Italy
French

In english menu i nedd to insert the England flag.Please Help me

Thanks and regards

Anitha

Re: How to insert image in Menu bar

Chandrasekharan P14-May-09 23:01

Chandrasekharan P

14-May-09 23:01

This will help you

http://www.codeproject.com/KB/menus/newmenuxpstyle.aspx

Re: How to insert image in Menu bar

Hamid_RT16-May-09 0:33

Hamid_RT

16-May-09 0:33

CMenuEX - A bitmap menu class[^].

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

pThread for x64 system

Ranojay14-May-09 20:43

Ranojay

14-May-09 20:43

Hi friends

Can someody tell me how to find pThreadVC.dll and pThreadVC.lib for x64 sytem. I mean I need 64 bit binaries to raun on 64 bit system.

I have the source files and I have also managed to get the 64 Binaries from them, But they are not working

If I use nmake to create 64 bit what option should I give as command line parameter so that it will create 64bit output

Thanks

Re: pThread for x64 system

Stuart Dootson14-May-09 21:43

Stuart Dootson

14-May-09 21:43

Ranojay wrote:
If I use nmake to create 64 bit what option should I give as command line parameter so that it will create 64bit output

You need to use the correct Visual C++ binaries. Usually you can do that by changing working directory to your VC directory (e.g. c:\Program Files\Microsoft Visual Studio 9.0\VC for VS2008) and using one of these commands:

If you're running 64-bit Windows
```
vcvarsall x64
```
If you're running 32-bit Windows
```
vcvarsall x86_amd64
```

This will put the Visual C++ binaries to create 64-bit code at the head of your path. Entering the command 'cl' should now say something like this - note the for x64:

Microsoft (R) C/C++ Optimizing Compiler Version 15.00.30729.01 for x64
Copyright (C) Microsoft Corporation.  All rights reserved.

usage: cl [ option... ] filename... [ /link linkoption... ]

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: pThread for x64 system

Ranojay14-May-09 22:16

Ranojay

14-May-09 22:16

Thanks ...can u tell me the steps for this...
i will call this from the x64 commandline of MSVC 2005 ?
any changes to be done in the make file ?

thanks again

Re: pThread for x64 system

Stuart Dootson14-May-09 22:18

Stuart Dootson

14-May-09 22:18

Ranojay wrote:
any changes to be done in the make file ?

No idea - it depends on the makefile. Try it and see - you can't break anything...

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Win32 application with out an UI.

birajendu14-May-09 20:11

14-May-09 20:11

Hi,

I want a simple application which will only launch another application. But I dont want to show the cosole or any UI for the 1st application. can any one help me how to do so.

birajendu
CyberG India
Delhi
India

Rajesh R Subramanian14-May-09 20:16

14-May-09 20:16

Why do you need such a thing? Why can't the 'another application' be launched directly instead? There are valid reasons, but I want to know what's your case.

It is a crappy thing, but it's life -^ Carlo Pallini

birajendu14-May-09 20:21

14-May-09 20:21

I am lunching the 2nd application with some specific command line options, that is why i need this 1st appliaction.

birajendu
CyberG India
Delhi
India

Rajesh R Subramanian14-May-09 21:07

14-May-09 21:07

I'm just curious before I can give you an answer, why can you not just launch the second application with command lines already? Why the extra 'launcher' application?

It is a crappy thing, but it's life -^ Carlo Pallini

birajendu14-May-09 21:24

14-May-09 21:24

The end user has the requiremet like that. he want to launch the application with a icon click on desktop..... Smile | :)

birajendu
CyberG India
Delhi
India

Xing Chen14-May-09 22:16

Xing Chen

14-May-09 22:16

why not create a shortcut for your customer?

Rajesh R Subramanian14-May-09 22:23

14-May-09 22:23

You could do something like this:

#include <windows.h>
#include <tchar.h>

int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInst, LPTSTR lpCmdLine, int nCmdShow)
{
  <a href="http://msdn.microsoft.com/en-us/library/ms682512(VS.85).aspx">CreateProcess</a>[<a href="http://msdn.microsoft.com/en-us/library/ms682512(VS.85).aspx" target="_blank" title="New Window">^</a>]
  return false;
}

You might as well use ShellExecute or ShellExecuteEx, like Michael Schubert suggested.

It is a crappy thing, but it's life -^ Carlo Pallini

David Crow15-May-09 7:20

David Crow

15-May-09 7:20

So why not just change the shortcut to include the necessary arguments?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Naveen14-May-09 20:24

Naveen

14-May-09 20:24

Create a "Win32 Application" project. it won,t be having any GUI or console by default.

nave

[OpenedFileFinder] [My Blog]

Michael Schubert14-May-09 21:47

Michael Schubert

14-May-09 21:47

Something like this maybe:

#include <windows.h>
#include <shellapi.h>

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
  SHELLEXECUTEINFO ShExecInfo;
  ShExecInfo.cbSize = sizeof(SHELLEXECUTEINFO);
  ShExecInfo.fMask = NULL;
  ShExecInfo.hwnd = NULL;
  ShExecInfo.lpVerb = NULL;
  ShExecInfo.lpFile = "program.exe";
  ShExecInfo.lpParameters = "-switch1 -switch2";
  ShExecInfo.lpDirectory = "c:\\yourpath";
  ShExecInfo.nShow = SW_HIDE;
  ShExecInfo.hInstApp = NULL;

  ShellExecuteEx(&ShExecInfo);
	
  return 0;
}

birajendu15-May-09 0:36