CreateProcess vs WinExec - C / C++ / MFC Discussion Boards

Steve Mayfield20-Feb-05 13:21

20-Feb-05 13:21

It is probably simpler to put a picture control (or an icon control) in the dialog and use the OnPaint() or LoadIcon() function for that control.

Steve

Re: Drawing into a dialog box

eli1502197920-Feb-05 23:03

eli15021979

20-Feb-05 23:03

you shuold use CDC to get the device context:

CDC *dc = m_YourDialog.getDC();

// use dc's function to draw what you need(look for CDC in MSDN)
// don't forget to release thwe device context in the end
ReleaseDC(dc);

Regards,
Eli

Re: Drawing into a dialog box

JohnCz21-Feb-05 11:58

JohnCz

21-Feb-05 11:58

Each dialog created by wizard (MFC) has OnPaint – WM_PAINT message handler.
If you create API dialog WM_PAINT handler is the place.
You can also draw (paint) in WM_ERASEBKGND message handler.

JohnCz

Tab stop problems

Bi0Mutati0n20-Feb-05 9:33

Bi0Mutati0n

20-Feb-05 9:33

I created a simple login dialog for my app with the dialog editor. When I test the dialog, the controls with the tab stop property work fine; I can tab through them perfectly. But when I get to the same dialog in my compiled program, tab does not change the focus and causes an annoying system beep. Anyone now how to fix this? I am not using MFC at all.

Re: Tab stop problems

Michael Dunn20-Feb-05 10:44

Michael Dunn

20-Feb-05 10:44

That sounds like you're not calling IsDialogMessage() in your message loop.

--Mike--
LINKS~! Ericahist updated! | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ
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Re: Tab stop problems

Bi0Mutati0n20-Feb-05 12:25

Bi0Mutati0n

20-Feb-05 12:25

Oh, that's what it was. Thnx
Works now Big Grin | :-D

Can we set a global hook in a COM object?

nadzzz20-Feb-05 7:13

nadzzz

20-Feb-05 7:13

in the SetWindowsHookEx function, I set the _pModule->get_m_hInst() as the HINSTANCE parameter.

The relust of this code is a local hook on the procedure.
"Global hook procedures should be placed in a separate DLL". is com is a separate DLL

<br />
hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, <br />
                                 LowLevelKeyboardProc, <br />
                                 _pModule->get_m_hInst(), <br />
                                 0);<br />

a related article is talking about the subject in a standart DLL (not COM).
http://www.codeproject.com/win32/AntonioWinLock.asp

CreateProcess vs WinExec

Dominik Reichl20-Feb-05 6:55

Dominik Reichl

20-Feb-05 6:55

Hello!

I need to execute the HtmlHelp application with some file and page as parameter. I wanted to use the CreateProcess function for this, but unfortunately cannot get it work.

This works perfectly:

WinExec("hh.exe MyHelpFile.chm::features.html", SW_SHOW);

But this doesn't work:

STARTUPINFO sui;
PROCESS_INFORMATION pi;
ZeroMemory(&sui, sizeof(STARTUPINFO); sui.cb = sizeof(STARTUPINFO);
ZeroMemory(&pi, sizeof(PROCESS_INFORMATION);

CreateProcess("hh.exe", "MyHelpFile.chm::features.html", NULL, NULL, FALSE, 0, NULL, NULL, &sui, &pi);

Anyone knows why the WinExec works, but the CreateProcess doesn't?? Confused | :confused:

Thanks and best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: CreateProcess vs WinExec

Neville Franks20-Feb-05 8:38

Neville Franks

20-Feb-05 8:38

This looks good to me. From memory WinExec() is a wrapper around CreateProcess(). What does GetLastError() return?

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Re: CreateProcess vs WinExec

Dominik Reichl20-Feb-05 9:10

Dominik Reichl

20-Feb-05 9:10

It returns 2: file could not be found...

Any idea?

Best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: CreateProcess vs WinExec

Neville Franks20-Feb-05 9:18

Neville Franks

20-Feb-05 9:18

Try including the full path to the .exe

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Re: CreateProcess vs WinExec

Dominik Reichl20-Feb-05 9:26

Dominik Reichl

20-Feb-05 9:26

Hm.. Ok, now the hh.exe starts at least... Hh.exe is in my Windows directory, will it always be there? (under WinNT in WinNT directory?) Even if using the GetWindowsDirectory function, it's a dangerous assumption...

But now I get an error from the hh.exe: no command line was specified?!??!

Any more ideas?

Thanks and best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: CreateProcess vs WinExec

Graham Bradshaw20-Feb-05 10:34

Graham Bradshaw

20-Feb-05 10:34

I don't think you are supposed to do it this way. See this MSDN link[^] for details of the HtmlHelp API call. The added benfit of this is that when the application that displayed the help closes, the help file itself also closes automatically.

Re: CreateProcess vs WinExec

Ryan Binns20-Feb-05 17:03

Ryan Binns

20-Feb-05 17:03

Graham Bradshaw wrote:
The added benfit of this is that when the application that displayed the help closes, the help file itself also closes automatically.

Benefit?! Personally, I hate this "feature" Mad | :mad:

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: CreateProcess vs WinExec

Dominik Reichl21-Feb-05 6:59

Dominik Reichl

21-Feb-05 6:59

I know that crappy HtmlHelp API function. I will definitively not use this; if the WinExec call wouldn't work the users would have bad luck and no help Smile | :)

Fortunately the WinExec method works... I was just wondering why the CreateProcess doesn't work...

Best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: CreateProcess vs WinExec

Neville Franks20-Feb-05 12:39

Neville Franks

20-Feb-05 12:39

Dominik Reichl wrote:
Hm.. Ok, now the hh.exe starts at least... Hh.exe is in my Windows directory, will it always be there? (under WinNT in WinNT directory?) Even if using the GetWindowsDirectory function, it's a dangerous assumption...

Agreed. You need to follow the same rules as WinExec.

The directory from which the application loaded. 
The current directory. 
The Windows system directory. TheGetSystemDirectory function retrieves the path of this directory. 
The Windows directory. TheGetWindowsDirectory function retrieves the path of this directory. 
The directories listed in the PATH environment variable.

Dominik Reichl wrote:
But now I get an error from the hh.exe: no command line was specified?!??!

Does it work if you specify just the filename?

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

Re: CreateProcess vs WinExec

Dominik Reichl21-Feb-05 6:53

Dominik Reichl

21-Feb-05 6:53

Neville Franks wrote:
Does it work if you specify just the filename?

No, it doesn't. Exactly the same message appears.

Thanks and best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: CreateProcess vs WinExec

David Crow21-Feb-05 4:20

David Crow

21-Feb-05 4:20

Neville Franks wrote:
From memory WinExec() is a wrapper around CreateProcess().

I read this same thing, too.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Re: CreateProcess vs WinExec

Blake Miller22-Feb-05 6:46

Blake Miller

22-Feb-05 6:46

Because, when you pass the command line, you usually have to include the full file path to the EXE as the first argument on the command line. Traditionally, argv[0] is the path to the program and ANY arguments after that are of interest, so, try this instead...

STARTUPINFO sui;PROCESS_INFORMATION pi;ZeroMemory(&sui, sizeof(STARTUPINFO); sui.cb = sizeof(STARTUPINFO);ZeroMemory(&pi, sizeof(PROCESS_INFORMATION);CreateProcess("hh.exe", "hh.exe MyHelpFile.chm::features.html", NULL, NULL, FALSE, 0, NULL, NULL, &sui, &pi);

Note that I ONLY typed in hh.exe at beginning of command line, you might actually need the FULL file path..

STARTUPINFO sui;
PROCESS_INFORMATION pi;
ZeroMemory(&sui, sizeof(STARTUPINFO);
sui.cb = sizeof(STARTUPINFO);
ZeroMemory(&pi, sizeof(PROCESS_INFORMATION);
CreateProcess("hh.exe", "<full path="" to="" hh.exe="" here=""> <full path="" to="" help="" file="" here="">::features.html", NULL, NULL, FALSE, 0, NULL, NULL, &sui, &pi);

See if that works...

Re: CreateProcess vs WinExec

Dominik Reichl22-Feb-05 8:25

Dominik Reichl

22-Feb-05 8:25

It works perfectly when I prepend the command-line a "hh.exe " and pass the full path to the executable as first parameter for CreateProcess.

Many thanks!!

Best regards,
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Minimize event

Deian20-Feb-05 6:13

Deian

20-Feb-05 6:13

Hello,

how do I get notified if the user is pressing the minimize button in dialog based app, so I can perform certain operation?

Thanks in advance,
D.

Re: Minimize event

Dominik Reichl20-Feb-05 6:57

Dominik Reichl

20-Feb-05 6:57

Implement your own OnSysCommand handler:

void CMyDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
    if(nID == SC_MINIMIZE)
    {
         // Do stuff
    }
    CDialog::OnSysCommand(nID, lParam);
}

Hope that helps, best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: Minimize event

Deian20-Feb-05 7:07

Deian

20-Feb-05 7:07

Thanks

delay() function equivalent in VC++ 6.0 -- is there any?

ur_unholyness20-Feb-05 2:42

ur_unholyness

20-Feb-05 2:42

I am working on a graphics application where I draw an ellipse and I need to incorporate a little delay, then erase this ellipse and redraw it elsewhere. I was able to do it very easily in Turbo C using the delay() function. How do I implement this in VC++ 6.0?

log live the dEvIL

Re: delay() function equivalent in VC++ 6.0 -- is there any?

eli1502197920-Feb-05 3:57

eli15021979

20-Feb-05 3:57

you shuold use the Sleep() function.
it takes 1 parameter(DWORD) which is the time to sleep,in miliseconds.

Regards,
Eli

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