How to load dll file in my VC++??

[Bartec]

Hi!

Actually I make program in VC++ and I need to load some function from dll file. I have only this dll file and nothing more. My dll file name is sche.dll and contain void showTr() method. I think I should try to load it dynamically and below is code I used:


//------------------------------------------------------------

HINSTANCE appInstance;

   appInstance = LoadLibrary("sche.dll");

			if(appInstance != NULL)
			{
				MessageBox("Got it!");
			
			}

				
  typedef void (__stdcall *showTrFn)();

  showTrFn pfnPokazOkno = (showTrFn)  GetProcAddress((HINSTANCE) appInstance, _T("showTr"));

ASSERT(pfnPokazOkno);//<---this is line I have run time  error

//-----------------------------------------------------

Compiler does not show any erorrs or warnings. So please help me find a bug. And one more thing dll is made in VB.

Thanks for any help

Cheers

Bartec





//------------------------------------------------------------

 

[shetlandbob]

Have you looked at MSDN?

Have you stepped through your code?

Try GetLastError() to see if you can see what error (if any) you get on loading the dll.

Robert Cumming

http://www.consultantengineer.co.uk

 

[NullTerminator]

make sure your functions is actually exported from your dll!
declare as
__declspec(dllexport) void showTr();

You can verify by doing
dumpbin /EXPORTS sche.dll

 

[NullTerminator]

Sorry, I missed the fact that your dll was written in VB.

Here's an article on how to cause VB to actually export your methods.

http://www.windowsdevcenter.com/pub/a/windows/2005/04/26/create_dll.html

Jeb Beasley
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