How Do I Write A Wrapper

Originally posted by feindfolio
i want to write a wrapper for a dll so it can be used by someone that uses vb.....the sack needs to be set up _stdcall and it is not... the dll was writen by dialogic so i do not have source
for give me i am new to c++

i think this (http://www.dev-archive.com/forum/showthread.php?s=&threadid=231254) will get you started.

Originally posted by feindfolio
i can not click on link please post url
thank you very much

http://www.dev-archive.com/forum/showthread.php?s=&threadid=231254

I'd write a COM object to cope with the interaction between the dll and VB.

You'll need COM object with

(a) A dual interface
(b) All the [in] [out] and [retval] implemented on methods.
(c) Just using the standard VB types (i.e. all those in the VARIANT structure).

So you'll need to look up COM and ATL and very probably COM interaction in VB.

It's not too difficult - I've done it loads and loads of times and never had a problem doing so but you will need to be abreast of COM objects before attempting it.

I'd suggest writing a simple COM object to test out the interaction with VB first.

You're COM object can load the dll in question in its constructor, and unload it in the destructor and then just have methods for calling the same exported methods in the dll.

Darwen.

It needs to be written in C++. If you could wrap a dll in VB you wouldn't need a COM object.

Darwen.