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Visual Studio 2010 MFC ActiveX: How to declare and call a function in a DLL

I've created an MFC ActiveX Control in VS 2010 using the MFC ActiveX Wizard.

I need to call a function in an existing DLL. How do I declare it? Where would the declaration go?

All I know about the function is the declaration given to me (see code snippet)

BTW, I'm a complete nube in VS and C++ so the more detail the better :)

Int TheFunction (
  HDC hdc,      // handle to the device context
  Int nEscape,   
  Int cbParameter,
  LPCSTR lpszParameter,  //use char* ?
  Int cbResult,
  LPSTR lpszResult      //use char* ?
);

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jkr

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BlueKarana

ASKER

After an hour of searching, submitting the question...two seconds later I may have found the answer:

found code at: http://goffconcepts.com/techarticles/development/cpp/calldll.html

Haven't tested it yet, though.

// Define the DLL function
	/* get handle to dll */
		HINSTANCE hGetProcIDDLL = LoadLibraryW(LPCWSTR("TheDLLFile.dll")); 

	   /* get pointer to the function in the dll*/
		FARPROC lpfnGetProcessID = GetProcAddress(HMODULE (hGetProcIDDLL),"TheFunction"); 

	   /* 
		  Define the Function in the DLL for reuse. This is just prototyping the dll's function. 
		  A mock of it. Use "stdcall" for maximum compatibility. 
	   */
		typedef int (__stdcall * pICFUNC)(HANDLE, int, int, const char*, int, char*); 

	   pICFUNC TheFunction; 
	   TheFunction = pICFUNC(lpfnGetProcessID);

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BlueKarana

ASKER

The second snippet looks like what I need.

Thanks!