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error C2057: expected constant expression

Posted on 2004-10-23
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Last Modified: 2013-11-20
After making a dialog using and using the Wizard to make a class The code compiles OK.

When I include the header file for this new class  #include "mydialog.h"  in CMainFrame the coimpiler complains.

error C2065: 'IDD_DIALOG_1' : undeclared identifier
error C2057: expected constant expression



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Question by:hansw77041
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by:hansw77041
ID: 12391036
Answering my own question.
I have no idea why including the  #include "resource.h" in the Cmydialog get rid of the error but it does.


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jkr earned 1500 total points
ID: 12391069
>>I have no idea why including the  #include "resource.h" in the Cmydialog get rid of the error

Becuase that file is maintained by the resource editor and this one put the definition of IDD_DIALOG_1 right in there. All resources need to have an uniqe identifier, and whenever you create a resource with Visual Studio, it will #define this one in 'resource.h' by default.
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