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#define _UNICODE

Posted on 2000-04-13
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Last Modified: 2013-11-20
If I use the preprocessor definition _UNICODE, I can't compile..

I get the following error message:

libcmtd.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16


WHY?? It works great then _UNICODE is not defined..
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Question by:lar_jens
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12 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 2711711
When compiling a Win32 GUI app using UNICODE, the entry point has to be

int PASCAL  wWinMain    (   HANDLE  hInstance,
                            HANDLE  hPrevInstance,
                            LPCTSTR lpszCmdLine,
                            int     nCmdShow
                        )
{
 // ...
}

instead of 'WinMain()'...

BTW: Be sure to also

#define UNICODE

without the prepending underscore...
0
 
LVL 1

Author Comment

by:lar_jens
ID: 2711788
??? But, I thought that MFC took care of the entry point in the CWinApp class..
0
 
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Author Comment

by:lar_jens
ID: 2711926
??? But, I thought that MFC took care of the entry point in the CWinApp class..
0
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LVL 1

Author Comment

by:lar_jens
ID: 2713075
See text above...

When developing COM objects, the _UNICODE label is defined.. What is the difference between _UNICODE and UNICODE?

None, I think...
0
 
LVL 32

Accepted Solution

by:
jhance earned 100 total points
ID: 2713316
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LVL 1

Expert Comment

by:nv3prasad
ID: 2713696
Step 1:
Open the "Project Settings" Dialog

Step 2:
Go to the Link Tab and select category as "Output" from the combo box.

Step 3:
"In the Entry-point symbol:" type the following

wWinMainCRTStartup

This should solve your link problems.

nv3prasad
 
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LVL 32

Expert Comment

by:jhance
ID: 2714332
nv3prasd,

BRILLIANT!!!  Oh man, you're such a genius!  You were able to follow the URL that I posted and copy the information out of it and post it here as YOUR answer!  Oh gosh, where would we be without your wisdom and insight!
0
 
LVL 1

Author Comment

by:lar_jens
ID: 2714898
I really don't know which one of you deserves the points..
0
 
LVL 1

Author Comment

by:lar_jens
ID: 2714902
I have decided to give jhance the points since he was first with the solution....
0
 
LVL 1

Author Comment

by:lar_jens
ID: 2714906
Thanks man.. Now I know that the
CString::GetLength() function returns the number of CHARACTERS in a string. Not the number of BYTES as stated in the MSDN documentation...

0
 
LVL 1

Expert Comment

by:nv3prasad
ID: 2716339
Dear jhance,

"BRILLIANT!!!  Oh man, you're such a genius!  You were able to follow the URL that I posted and copy the information out of it and post it here as YOUR answer!  Oh gosh, where would we be without your wisdom and insight!"

The above is an understatement, I had this problem, so I exactly knew the point, so I just provided the solution.

I apprecitae his selection of your answer since you had posted a URL before my explanation. But being an expert you should learn to respect and understand other people.

nv3prasad
0
 
LVL 32

Expert Comment

by:jhance
ID: 2716397
nv3...,

Being an expert yourself you should know better than to post an answer which duplicates another posting already on the question.  If you don't have the time or incliation to review the history, post it as a comment.
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