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using VC++ dll in VB

I wrote a dll in VC++ 6.0, and using it in VB 6.0. I get an error when trying to set a reference to it. What do I need to do to make it work properly with VB? Example would be helpful.

jhance

Two things:

1) In your VC++ DLL, you must specify all the exported function as:

extern "C" __declspec(dllexport)

and also __stdcall

So a typical function declaration would be:

extern "C" __declspec(dllexport) void __stdcall ExportedFunctionName(void);

2) In your VB program, you need this.

Private Declare Function ExportedFunctionName Lib "YourDll.dll" Alias "_ExportedFunctionName@0" ()

The "@0" at the end varies depending on the number and type of the arguments to the function. If in doubt, check the DLL's ACTUAL names with DUMPBIN /EXPORTS

c095276

ASKER

I have already done this. What I want to know is, can I set a reference to my dll under projects->references, so that someone can use the object browser to view its interface? If so, how is it done?

inpras

No
U annot do that unless its a type library or ActiveX for .dll U have to follow what jhance has told

c095276

ASKER

I was looking in MSDN library, and ran across this

"Code objects into a compiled .c or .cpp file so they can be accessed using IDispatch::GetTypeInfo or implementations of the ITypeInfo and ITypeLib interfaces."

Is there any good examples of doing either of these?

Thanks

mahno

But what does "DUMPBIN /EXPORTS" show?

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jhance

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jhance

c095276,

Next time, keep your points!