Calling Class Functions in ASM?

I am trying to call a function that is in a class, through ASM. I have looked at the Assembly Listing Files, and I tried the code. It didn't work. I am programming an engine in SDL, btw. It was something like this (what I got from the listing files):

Code:

__asm
{
push 0
mov  edx, SDL_SWSURFACE | SDL_ANYFORMAT
push edx
push 16
push 480
push 640
mov  ecx, szTitle
push ecx
mov  eax, DWORD PTR screen

mov  ebx, g_Engine        // 'g_Engine' : My global engine class declaration
call    SDLWindow           // Call 'EngineSDL::SDLWindow'
}

This code will give me an error that says (something like this):

'SDLWindow' ... Label not defined

The listing file had some other characters in it, but they weren't part of the code. And it also included some text 'EngineSDL'. At the end, the comment says " EngineSDL::SDLWindow". If anyone can offer me any help on how to call the equality to g_Engine->SDLWindow(...) in ASM, please help me. I would like to figure this out.

Just a suggestion...

Use your compiler to display the assembly syntax for calling a c++ function in 'normal' c++ code. Presumably you could then adapt this information to ensure that 'SDLWindow' is defined?

There's no easy way to do it, and if you find a way it might not work on another (similar Win32) compiler, a different version of the compiler or even a different build configuration (optimised release builds can often take big liberties with how class members are dealt with....you may find that your code is broken at the point where you want to release it).