Subj : How to get address of CALLBACK function?
To   : borland.public.cpp.borlandcpp
From : Gasparics, Antal
Date : Wed Mar 30 2005 10:05 am

Hi,

I need to define a callback function, and pass its address (as DWORD 
type) to the WIN. Therefore, I need to identify the address of my class 
memeber function, but I could not find the proper way for that. Can 
anybody help me?

This thing can not be compiled:

    DWORD waveOutProcAddress;

    waveOutProcAddress = &TWaveChannel::waveOutProc;

I got this error message:

    [C++ Error] Wave.cpp(26): E2034 Cannot convert 'void (__stdcall
    TWaveChannel::*)(void *,unsigned int,unsigned long,unsigned
    long,unsigned long)' to 'unsigned long'

The definition of the functions is in this way:

class TWaveChannel
{
  private:                     // Internal members
    // Call back funtions
    void CALLBACK waveOutProc(HWAVEOUT hwo,
                              UINT uMsg,
                              DWORD dwInstance,
                              DWORD dwParam1,
                              DWORD dwParam2);
.....
};

.