Why do I get a "Cannot Find entry point" error when trying to call my VC++ dll from VB?

This is usually because of name mangling performed by the compiler. When you export the functions from your VC++ dll using __declspec(dllexport), the symbol that the compiler really exports is not the actual function name, but one that it creates for it that includes additional information, like how many bytes it takes as parameters. That means that if you export a function called MyFunc(), the compiler might turn up exporting something like _MyFunc@2. That's not what you wanted, was it?

To correct the issue, forget about using __declspec(dllexport). Instead, create a .DEF file for your dll and add it to the project (the file usually has the same name as the dll). Then add an EXPORTS section to it and list all the functions you export from your library there, like this:

EXPORTS
MyFunc1
MyFunc2

and so on. That will instruct the linker to export those names instead of the mangled ones.