Re: Biometric scanner(Finger print reader) need help implementing in delphi.

I have a Delphi DLL that has two functions.  They return nothing, but get passed a pointer and an integer.  I'm having a hard time understanding how to reference the functions from within VC 6.  I can load the DLL, that's easy enough... however, how do I declare the functions so that VC 6 can locate them within the DLL and assign them to variable to be called?

Here is the VC 6 code I tried, and it didn't work.  

typedef VOID (*TGaugeCall)(PGAUGEHDR, int, UINT32); // function proto
typedef VOID (*TGaugeDraw)(HDC); // function proto
TGaugeCall GaugeCall = NULL; // function pointer
TGaugeDraw GaugeDraw = NULL; // function pointer
HMODULE MGaugeHandler = NULL;  // DLL handle

I understand that VC 6 does name mangling... so how do I write this so I can use the EXTERN "C" definition and dynamically link to the library?  My C knowledge is quite a bit rusty, so forgive me if I'm asking for too much.

Ed Wilson

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