Question

This question is an extension of a previous question: Return an object in VBA

Now, I’d like to know how to declare and initialize the object in VBA. It seems like I’d do it like so:

Declare Function ConnectMe Lib "C:\Windows\System32\cm.dll" (ByVal Arg1 As String) As ConnectMe
Declare Function login Lib "C:\Windows\System32\cm.dll" (ByVal Arg1 As String, ByVal Arg2 As String) As Boolean

Then, below this line, I could use this code:

dim cm as new ConnectMe

cm.ConnectMe("216.239.51.99")

cm.login("username","password")

However, when I do this, it gives me a “User-defined type not defined” error. How can I declare this C++ class appropriately so that I can create and use an instance in VBA?

Thanks.

Answer 1

This code is never going to work as it is. If you want to create a class in C++ under Windows and use it in any other programming language that is not C++, (VB for example) the “normal” approach is to create a COM class or an ActiveX control if you need to draw graphics.

You may also find this answer in SO helpful.