@Arrovs:
This is possible, but you need Lite-C syntax and pointers instead of normal c syntax and copying structs.

Interface could be found at "DLLs and API" in the manual but not very well documented.

@JustSid:
The function signature is copied from the manual, i didn't change that. Also this whole thing isn't compatible to MSVC at all i think. It appears that the Lite-C Compiler just takes the interface, adds -[>lpVtbl] to it and [&interface] as the first parameter of the function call.
And the member is in the vtbl because you cannot access if it is declared in the interface itself.