I already answered this once, but here is another way....

A DLL can see a symbol in the main app. It just can't dynamically link to
it.

If you the Windows API

GetProcAddress( HANDLE hModule, "NameOfFunction") you can retrieve the
address of the function in the main program.

The main program can supply its 'hInstance' as the value for the DLL to use
for hModue in calls to GetProcAddress.

Bob Ammerman
RAm Systems

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