Codejock Developer Community : AfxGetMainWnd() returns NULL? http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 27 Apr 2026 17:24:35 +0000 Tue, 02 Oct 2007 04:16:31 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=8230 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[AfxGetMainWnd() returns NULL? : Thanks for above, fixed now as...]]> http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26775&title=afxgetmainwnd-returns-null#26775 Author: terrym
Subject: 8230
Posted: 02 October 2007 at 4:16am

Thanks for above, fixed now as we rewrote our own ProcessShellCommand, which works perfect, not sure why the original one worked and after a few changes it stopped, but thanks for above.
 
Just glad to get it working again as behind schedule now ;)
]]> Tue, 02 Oct 2007 04:16:31 +0000 http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26775&title=afxgetmainwnd-returns-null#26775 <![CDATA[AfxGetMainWnd() returns NULL? : AIUI, m_pMainWnd only becomes...]]> http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26717&title=afxgetmainwnd-returns-null#26717 Author: Roger
Subject: 8230
Posted: 01 October 2007 at 11:57am

AIUI, m_pMainWnd only becomes valid after calling ProcessShellCommand. However, during this function, OnNewDocument() gets called before the frame has been created.
 
This only happens the first time the program starts, in every other call of OnNewDocument(), the main window pointer will be valid.
 
Can you defer your processing until OnInitialUpdate() for a view?
 
Regards,
Roger
]]> Mon, 01 Oct 2007 11:57:10 +0000 http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26717&title=afxgetmainwnd-returns-null#26717 <![CDATA[AfxGetMainWnd() returns NULL? : but m_pMainWnd is NULL :( ]]> http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26713&title=afxgetmainwnd-returns-null#26713 Author: terrym
Subject: 8230
Posted: 01 October 2007 at 10:29am

but m_pMainWnd is NULL :(]]> Mon, 01 Oct 2007 10:29:31 +0000 http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26713&title=afxgetmainwnd-returns-null#26713 <![CDATA[AfxGetMainWnd() returns NULL? : Surely the document architecture...]]> http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26712&title=afxgetmainwnd-returns-null#26712 Author: terrym
Subject: 8230
Posted: 01 October 2007 at 10:19am

Surely the document architecture creates the CMainFrame instance in the above code, all we do after is

// show and update window

m_pMainWnd->ShowWindow( SW_SHOW );

m_pMainWnd->UpdateWindow();

]]> Mon, 01 Oct 2007 10:19:57 +0000 http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26712&title=afxgetmainwnd-returns-null#26712 <![CDATA[AfxGetMainWnd() returns NULL? : Ah ok, I must be blind and getting...]]> http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26707&title=afxgetmainwnd-returns-null#26707 Author: terrym
Subject: 8230
Posted: 01 October 2007 at 9:21am

Ah ok, I must be blind and getting dumb the older I get
 
Anychance you can show example below please
]]> Mon, 01 Oct 2007 09:21:33 +0000 http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26707&title=afxgetmainwnd-returns-null#26707 <![CDATA[AfxGetMainWnd() returns NULL? : You didn&#039;t paste lines _after_...]]> http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26706&title=afxgetmainwnd-returns-null#26706 Author: Oleg
Subject: 8230
Posted: 01 October 2007 at 9:16am

You didn't paste lines _after_ ProcessShellCommand where you create instance of CMainFrame.]]> Mon, 01 Oct 2007 09:16:00 +0000 http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26706&title=afxgetmainwnd-returns-null#26706 <![CDATA[AfxGetMainWnd() returns NULL? : Hi But this is not the case: CSingleDocTemplate...]]> http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26702&title=afxgetmainwnd-returns-null#26702 Author: terrym
Subject: 8230
Posted: 01 October 2007 at 8:57am

Hi

 
But this is not the case:
 

CSingleDocTemplate *pDocTemplate;

pDocTemplate = new CSingleDocTemplate( IDR_MAINFRAME, RUNTIME_CLASS( CMainDoc ), RUNTIME_CLASS( CMainFrame ), RUNTIME_CLASS( CWorkspaceView ) );

AddDocTemplate( pDocTemplate );

EnableShellOpen();

CCommandLineInfo cmdInfo;

ParseCommandLine( cmdInfo );

if ( !ProcessShellCommand( cmdInfo ) )

{
// do error
}
 
 
 
See the above works fine if I just run the app, but if I pass a command line to load a file it then does it
 
it's like something is stopping m_pMainWnd from initialising as it creates the CMainFrame etc. for us using the doc architecture
 
Any ideas much appreciated
]]> Mon, 01 Oct 2007 08:57:28 +0000 http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26702&title=afxgetmainwnd-returns-null#26702 <![CDATA[AfxGetMainWnd() returns NULL? : Hi, Obviously you create CMainFrame...]]> http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26700&title=afxgetmainwnd-returns-null#26700 Author: Oleg
Subject: 8230
Posted: 01 October 2007 at 8:50am

Hi,
 
Obviously you  create CMainFrame after ProcessShellCommand call.
]]> Mon, 01 Oct 2007 08:50:36 +0000 http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26700&title=afxgetmainwnd-returns-null#26700 <![CDATA[AfxGetMainWnd() returns NULL? : It must be in our code, but it...]]> http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26690&title=afxgetmainwnd-returns-null#26690 Author: terrym
Subject: 8230
Posted: 01 October 2007 at 7:05am

It must be in our code, but it seems that when our app calls
 

if ( !ProcessShellCommand( cmdInfo ) )

 

this in turn calls OnOpenDocument (which we have overridden) but if we pass a filename on the commandline then m_pMainWnd is null, if we dont pass a filename then it is correct

Strange, any ideas much appreciated]]> Mon, 01 Oct 2007 07:05:36 +0000 http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26690&title=afxgetmainwnd-returns-null#26690 <![CDATA[AfxGetMainWnd() returns NULL? : Reason can be only in code you...]]> http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26659&title=afxgetmainwnd-returns-null#26659 Author: Oleg
Subject: 8230
Posted: 30 September 2007 at 9:16am

Reason can be only in code you have. Trace where you created CMainframe and where you call AfxGetMainWnd() .

]]> Sun, 30 Sep 2007 09:16:25 +0000 http://forum.codejock.com/forum_posts.asp?TID=8230&PID=26659&title=afxgetmainwnd-returns-null#26659