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CALLBACK function

Posted on 1999-06-30
Medium Priority
Last Modified: 2010-04-02
Is it possible to have a function in a class that calls DialogBoxIndirect() and passes to it DialogProc() function which is a non-static member of the same class?
Question by:alex1234
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LVL 86

Accepted Solution

jkr earned 200 total points
ID: 1198863
>>which is a non-static member of the same class?

In short words - no.

A class' member function can only be a callback when it's declared 'static'. All C++ member functions are passed a 'this' pointer as a hidden argument to maintain the method/object relation. The only way to get around this is declaring the member as 'static', so no 'this' pointer is used (and the parameter list matchs the one of a callback funcfion).

Author Comment

ID: 1198864
That's too bad...
LVL 86

Expert Comment

ID: 1198865
Yes, it is - BTW: If you want to know more about how to handle C++ method pointers (err, they aren't real pointers, but indices into '_vtbl'), see ''

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