C / C++ / MFC Discussion Boards

Re: How to get keybord messages( such as"Alt +Shift"), when my app have not active window.

Anonymous19-Jan-04 4:26

19-Jan-04 4:26

Hi Murad,
You can write hook application to monitor system wide key press. Following link might be of some help to you
http://www.codeproject.com/dll/keyboardhook.asp?target=hooks

Check out other hook articles on codeguru

Have fun,
Anunay

Re: How to get keybord messages( such as"Alt +Shift"), when my app have not active window.

anunay19-Jan-04 4:26

anunay

19-Jan-04 4:26

Re: How to get keybord messages( such as"Alt +Shift"), when my app have not active window.

Mike Dimmick19-Jan-04 5:17

Mike Dimmick

19-Jan-04 5:17

RegisterHotKey.

Re: How to get keybord messages( such as"Alt +Shift"), when my app have not active window.

Murad20-Jan-04 2:27

Murad

20-Jan-04 2:27

It works fine, Thank you!

Best Regards
Murad.

Read a DigetScale that is connected to Serial

Tiaan Strydom19-Jan-04 3:08

Tiaan Strydom

19-Jan-04 3:08

Hi My question is: MY program that i wrote is working fine it opens the serial and close it it works fine on a modem BUT when i connect it to the scale it works perfctly.. We have used pascal to do the reading but pascal do not work with windows Xp so have to code in MS visial c++6.

i want to send the scal a character 5 how do i do this in c++?? This is a sample of my pascal program.

PROGRAM SKALE;
USES
Dos, Crt;
CONST
CtrlE=#5; (THIS IS WHAT I WANT TO SEND A CTRLE TO READ THE STRING BACK TO ME!!)
VAR
poort, data: text; {Poort en leer veranderlikes}
junk, gewig: String; {Lees die gewig vanaf skale}
BEGIN
Assign(poort, 'COM1'); {Com2 word gelees vir data}
Assign(data, 'C:\SKALE\IN.TXT'); {Inbrug se data leer}
Rewrite(data);
Rewrite(poort);
Writeln(poort,CtrlE); {Vra skaal vir gewig}
Reset(poort);
Read(poort,junk);
Delay(1000);
Rewrite(poort);
Writeln(poort,CtrlE);
Reset(poort);
Read(poort,gewig); {Lees gewig}
Writeln('Lees ',junk,' vanaf skaal.');
Writeln(data, gewig); {Skryf gewig in leer}
Close(poort);
Close(data);
END. Sigh | :sigh:

Thank you
Tiaan Strydom

Re: Read a DigetScale that is connected to Serial

valikac19-Jan-04 6:32

valikac

19-Jan-04 6:32

Check out MSDN.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnfiles/html/msdn_serial.asp

Kuphryn

64-bit compatibility

Vrushali519-Jan-04 2:50

Vrushali5

19-Jan-04 2:50

I am porting a 32-bit MFC application to 64-bit Windows.
I will be using Windows Server 2003 64-bit and Visual C++ .net 2003 Standard Win32 Edition .
1) Will there be a compatibility issue between these 2?
2) Does Visual C++ .net 2003 support 64-bit using the /WP64 switch? Does it have some extra/ other switches for 64-bit support?

Re: 64-bit compatibility

Mike Dimmick19-Jan-04 5:15

Mike Dimmick

19-Jan-04 5:15

MSDN information on 64-bit Windows[^].

64-bit applications at present can only be built using the compilers in the Driver Development Kit[^]. For the most part, Win64 is a pure extension of Win32 with some pointer and integer types extended to 64 bits. In terms of compatibility, you can run most IA-32 binaries on a 64-bit platform (albeit slowly at present on Itanium), but I don't think that's what you were after.

Visual C++ .NET 2003 uses version 13.10 of the x86 compiler, which supports the /wp64 64-bit portability warning switch. This switch detects conversions from types tagged __w64 to types smaller than 64 bits without this tag.

It should be possible to use the 64-bit compilers from VS.NET using a makefile project, or by changing the directories options. However, you won't be able to debug from VS.NET at present, as it only understands x86 native code. You'll have to use WinDBG, from the Microsoft Debugging Tools[^] kit.

CSplitter Windows

Sitaram Sukumar19-Jan-04 2:48

Sitaram Sukumar

19-Jan-04 2:48

I have written an application which has a splitter window (2 panes), I hvae written 2 different view Classes for these panes. In one view I have a List box and in the other I have a Dialog box with a few controls.
Now as I change the selection of items in the list box, I need to disable/ enable certain controls in the other pane. How do I communicate between the two panes

With Regards

Re: CSplitter Windows

David Crow19-Jan-04 4:31

David Crow

19-Jan-04 4:31

Each view should communicate with the other either by sending messages to the parent. Yes, one view could send a message directly to the other, but then those two views are now "tied" together.

A rich person is not the one who has the most, but the one that needs the least.

Re: CSplitter Windows

anunay19-Jan-04 4:34

anunay

19-Jan-04 4:34

Store pointer of these views as member variable in your CMainFrame class. Write some function which will return you these pointer. Use CMainFrame object to access these functions

How to show network machines from Browse button

mpb19-Jan-04 2:31

mpb

19-Jan-04 2:31

Hi All,

I want to show all machine names, present on the network, through Browse button.
The API NetQueryDisplayInformation() does not support Windows 98 and my application will run on Windows 98.
Does anybody can help me in this regard ?

Regards,
MPB

Hi,
Good site

Re: How to show network machines from Browse button

David Crow19-Jan-04 2:38

David Crow

19-Jan-04 2:38

See if WNetOpenEnum()/WNetEnumResource() will help.

A rich person is not the one who has the most, but the one that needs the least.

How to force a reboot

JaniOrca19-Jan-04 2:16

JaniOrca

19-Jan-04 2:16

Hi

I am writing an application in VC that has to automatically reboot itself (occasionally the vendors graphics drivers fail and the only way to resolve it is by rebooting)

How do I force a reboot in Window (2000 Pro) There seems to be a command for it in VB but I haven't found anything in VC

Thanks for any help

Re: How to force a reboot

David Crow19-Jan-04 2:17

David Crow

19-Jan-04 2:17

How about ExitWindows[Ex]()?

A rich person is not the one who has the most, but the one that needs the least.

Re: How to force a reboot

JaniOrca19-Jan-04 2:24

JaniOrca

19-Jan-04 2:24

Found it.

For anybody who cares, you call ExitWindowsEx to force a system shut down.

Re: How to force a reboot

vcplusplus19-Jan-04 4:00

vcplusplus

19-Jan-04 4:00

You must use AdjustTokenPrivileges for NT/2000/XP to use ExitWindowsEx(...).

I found this on the internet.

DWORD dwVersion = GetVersion();

if ( dwVersion < 0x80000000)
{
            // OS is NT/2000/XP
    HANDLE hToken;
    LUID tmpLuid;

    HANDLE handleProcess=GetCurrentProcess();

    if (!OpenProcessToken(handleProcess,TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
        return;

    if (!LookupPrivilegeValue(0,"SeShutdownPrivilege", &tmpLuid))
        return;

    TOKEN_PRIVILEGES NewState;
    LUID_AND_ATTRIBUTES luidattr;

    NewState.PrivilegeCount = 1;
    luidattr.Luid=tmpLuid;
    luidattr.Attributes=SE_PRIVILEGE_ENABLED;
    NewState.Privileges[0]=luidattr;

    if (!AdjustTokenPrivileges(hToken, false, &NewState, sizeof(TOKEN_PRIVILEGES), 0, 0))
        return;
}
ExitWindowsEx(...);

Closing dialog

Hans Ruck18-Jan-04 23:57

Hans Ruck

18-Jan-04 23:57

I'm processing OnInitDialog of a MFC dialog-based application, before the window is shown. Sometimes i need to close this dialog and i'm using PostQuitMessage(0), but the window will flash for a short moment before the application ends.

Do you know what is the easiest way of getting rid of that flash? I can handle it but my solution is not quite simple.

rechi

Re: Closing dialog

22491719-Jan-04 0:39

224917

19-Jan-04 0:39

CDialog::OnOk();

greatest thing is to do wot others think you cant Smile | :)

suhredayan@omniquad.com

Re: Closing dialog

Hans Ruck19-Jan-04 0:47

Hans Ruck

19-Jan-04 0:47

Thanx!

rechi

Re: Closing dialog

David Crow19-Jan-04 2:23

David Crow

19-Jan-04 2:23

Use EndDialog() instead.

A rich person is not the one who has the most, but the one that needs the least.

Re: Closing dialog

Hans Ruck19-Jan-04 2:27

Hans Ruck

19-Jan-04 2:27

OK.

rechi

Change the name of Child Window in MDI

swarnamanoo18-Jan-04 23:16

swarnamanoo

18-Jan-04 23:16

How Can i change the name of the child window in an MDI application developed using MFC Appwizard...

Re: Change the name of Child Window in MDI

Adi Narayana19-Jan-04 1:48

Adi Narayana

19-Jan-04 1:48

Just go to the correspondind child windows document class's classwizard and add function SetTitle.... in that function u can set the name u want to the child window..

gudluck
adi

Re: Change the name of Child Window in MDI

22491719-Jan-04 1:53

224917

19-Jan-04 1:53

GetActiveFrame()->SetWindowText("helloman");

greatest thing is to do wot others think you cant Smile | :)

suhredayan@omniquad.com

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