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Can someone please direct me to a source of information on how to trace / debug standard MFC commands. For example File.. Save.. I am using "MFC Internals" for a guide but cannot see how to debug the command message flow.
Thanks for reading
Cheers Vaclav
Update
I have overridden OnCommand in main and MDI frame and can trace the command flow from the main menu to the MDI OnCommand. Now how do I get / step into base class? F11 does not respond.
modified on Tuesday, July 21, 2009 4:07 PM
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Thanks Mike,
The article does confirm what I got from the book. What I am still missing is how to get to the base class using debug steps.
I must be missing some options in my VC 6.0 because F11 just does not do anything visible and the program is stuck in last debug point. I will try just source code of the MFC base class next.
Vaclav
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Up to a point, I think at the Win32 level, there is no more visible "code" to step into.
This signature was proudly tested on animals.
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After raking a short brake from coding I came to the same conclusion.
It always amazes me how taking breaks from many “problems” gives person a different outlook on things. Was that covered in some famous book?
Thanks for your help.
Vaclav
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I would like to use the CMFCtoolBars to replace CToolBars, so I am guessing I need to integrate the Feature Pack to my MFC application. Do I have to change all the base classes(CStatusBar, CWinApp...etc) to those from the feature pack if I only wanted to change the CToolbar, or can I change CToolBar only and still get it to work?
Thanks
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I think you can just "plug'n'play".
This signature was proudly tested on animals.
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I created a test application using LsaEnumerateLogonSessions and LsaGetLogonSessionData, which displays the number of interactive logged on users. It works fine on Windows XP, but it displays 2 interactive logged on users on Windows Vista, even though I have only one user: the Administrator.
Can anyone tell me why this happens?
Thanks!
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Eikthrynir wrote: ...but it displays 2 interactive logged on users on Windows Vista, even though I have only one user: the Administrator.
Is the other a legitimate user, just not logged on?
"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
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I modified the application so that it displays also the user name. It's the same user...
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The LogonId data members are different, even though the UserName data member are the same...
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So it's showing Administrator twice? When I use that function on XP, it returns 6 sessions, even though I am the only one logged on to my machine. I don't have access to a Vista machine to see how it behaves.
What do NetWkstaUserEnum() and WTSEnumerateSessions() return?
"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
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No need to check. I think I known what's happening. I modified the application to display other information too. The SessionId for each occurence of MyAdminUser is different: it runs both in Session 0 and Session 1 and that's why it is shown twice. On Vista (I guess Window 7 too) I only have to skip counting the user running in Session 0. Thus, I get the correct number of interactive logged on users. As I have seen, on Windows XP there is no need for this trick.
I consider this problem solved now.
But there is something strange that happened while I was testing on my Vista machine: I had MyAdminUser and MyLimitedUser both logged on; my application showed 3 users (Session 0 (MyAdminUser), Session 1 (MyAdminUser), and Session 2 (MyLimitedUser)); I logged off from MyLimitedUser and immediately ran the application; it still showed 3 users; after almost minute, when I re-ran the application, it correctly showed 2 users: MyAdminUser (Session 0) and MyAdminUser (Session 1). What I am trying to say is that it showed 3 users for almost a minute... 
The strange thing is that I could not reproduce the problem. I tried to make it happen again, but I couldn't. I wonder why Windows needed so much time to update the number of interactive logged on users...
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Eikthrynir wrote: I wonder why Windows needed so much time to update the number of interactive logged on users...
Caching?
"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
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Hi All,
I am having COLORREF variable and i need to apply 60% alpha value to this color.
COLORREF clrSelection = RGB(255,65,67);
My requirement is to apply alpha value as 64 to the 'clrSelection' variable. How to do this in C++,MFC?
Thanks in advance,
Mutpan.
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AFAIK, you need to use GDI+ inorder to use alpha.
But you can keep the alpha value in COLORREF as
COLORREF clr = RGB( 1, 2, 3 );
BYTE alpha = 4;
clr |= ( alpha << 24 );
- ns ami -
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I've got unmanaged DLL that is being called from C# application using Interop. I need to step into native DLL function either from C# or debug native DLL and break at some break point.
I set up Enable unmanaged code debugging in C# console.
The DLL function is called correctly, e.g. it prints the message to console.
But as I run DLL with F5 and it invokes C# console, the break points do not work.
Nor can I step into DLL unmanaged code from C# console.
Чесноков
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Dear all,
I have got some source codes where used lots of EXIT_SUCCESS and EXIT_FAILURE for return values. I knew these EXIT_SUCCESS and EXIT_FAILURE are defined in stdlib.h/cstdlib.h; however, I don't see the source including both of the header files.
Of course, the source may include a header which include stdlib.h/cstdlib.h.
My question is how I can find where exactly the stdlib.h/cstdlib.h have been included.
Thanks. 
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BTW, I am using Visual Studio 2005. 
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Set the "Generate Pre-Processed File" option (Project Properties->Configuration Properties->C/C++->Preprocessor) to "With Line Numbers (/P)" and examine the .i files that are generated. These will be annotated with '#line items that indicate the original file that code came from.
[edit]Look for stdlib.h and you can find what includes it. afx.h, as far as I can tell.[/edit]
Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p
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I'm looking for a method that mimics the functionality of fread without a file pointer. I want to read from a buffer into a buffer, for a number of bytes and move the pointer to the source buffer by the number of bytes returned - like fread.
Anyone done anything like this?
Thanks in advance
Jer 29:11
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BYTE* pDest = <Destination Buffer>;
BYTE* pSrc = <Source Buffer>;
SIZE_T size = <Size to Read>;
MemoryRead(pDest, pSrc, size);
SIZE_T MemoryRead(BYTE* pDest, BYTE* pSrc, SIZE_T size)
{
CopyMemory(pDest, pSrc, size);
pSrc += size;
return size;
}
«_Superman_»
I love work. It gives me something to do between weekends.
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Very cool and to the point. The key was to return the size - like fread.
Thanks much 
Jer 29:11
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I spoke too soon!
Actually, it doesn't quite work like fread. CopyMemory - defined as RtlCopyMemory needs size as an input. fread on the other hand returns the number of bytes read.
Thanks for responding but I still don't have the solution.
Jer 29:11
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The reason is very clear. A file has an end and when you give a size, it will read either the mentioned size or till the end of the file. But a memory read either succeeds or fails.
«_Superman_»
I love work. It gives me something to do between weekends.
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