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MFC Question

Posted on 1998-08-19
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Last Modified: 2013-11-25
Can I use MFC40.dll in Visual Basic like any other Dll ?
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Question by:labrego
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4 Comments
 
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Expert Comment

by:snoegler
ID: 1429913
I don't think so. The functions of the mfc40.dll are stored as 'classes' - which means that the
exported names are not (at least in the usual way) accessible by any other application.
One cause is that c++ classes pass a 'virtual function table pointer'(vftbl), which as far as
i know is almost impossible to create without knowing the whole internal structure.
To make it short: I think the effort to make mfc40.dll work with visual basic is much harder as
simply simulate its functionality. Perhaps you could write a 'wrapper' dll which exports its
functions in the usual way.
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Author Comment

by:labrego
ID: 1429914
That means that the functionality in MFC40 is not available in VB 5.0? I'm looking for a way to implement a docking function

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Accepted Solution

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polygon earned 200 total points
ID: 1429915
No, you definitely can't use this DLL in a VB program. This is a kind of extension DLL and VB can't access it. You may try to write another DLL in C++ which links MFC40.dll and exports some function (but not classes) as "stdcall" and then you will be able to use this functions.
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Author Comment

by:labrego
ID: 1429916
Can you help to build a DLL in C++ which links MFC40.dll?
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