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  #1  
Old 18-Feb-2006, 11:07
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A linker error

Hi all,

I added Redo to the MenuBar of a MFC application and added the corresponding variables and functions to the CMainFrame class. The added lines to the message map is like this:

CPP / C++ / C Code:
ON_COMMAND(ID_EDIT_UNDO, OnEditUndo)
	ON_UPDATE_COMMAND_UI(ID_EDIT_UNDO, OnUpdateEditUndo)
	ON_COMMAND(ID_EDIT_REDO, OnEditRedo)
	ON_UPDATE_COMMAND_UI(ID_EDIT_REDO, OnUpdateEditRedo)

After adding these lines, a linker error occured saying
" error LNK2001: unresolved external symbol "public: void __thiscall CMainFrame::OnEditRedo(void)" (?OnEditRedo@CMainFrame@@QAEXXZ)".

Also the added variables in the CMainFrame class are :
CPP / C++ / C Code:
afx_msg void OnEditUndo();
	afx_msg void OnUpdateEditUndo(CCmdUI *pCmdUI);
	afx_msg void OnEditRedo();
	afx_msg void OnUpdateEditRedo(CCmdUI *pCmdUI);

The implementations of the functions OnEditUndo, OnEditUpdateUndo, OnEditRedo and OnEditUpdateRedo are empty. It is like:
CPP / C++ / C Code:
void CMainFrame::OnEditRedo()
{
	
}

What can be the reason of the linker error after the additions to the message map.

Thanks.
Last edited by LuciWiz : 19-Feb-2006 at 06:18. Reason: Please insert your C++ code between [c++] & [/c++] tags
  #2  
Old 18-Feb-2006, 12:35
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WaltP WaltP is offline
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Re: A linker error

Is this an MFC question? Shouldn't it be in the MFC forum?
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  #3  
Old 18-Feb-2006, 19:23
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Re: A linker error

I am not sure, but why dont you try this:
CPP / C++ / C Code:
public: void __thiscall CMainFrame::OnEditRedo(void) {

}

Regards,
Paramesh.
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  #4  
Old 19-Feb-2006, 05:22
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Re: A linker error

Unfortunately, It did not worked.
  #5  
Old 19-Feb-2006, 10:50
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Re: A linker error

Sometimes VS goes crazy.
Try to compile every file in your project, know that this sounds dumb but it has always worked with all my unreasonable errors.
 
 
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