Testing calling __thiscall functions (member functions) from (inline) asm (MSVC)

thiscall_test.c

#include "stdafx.h"

#include <stdio.h> //printf
#include <stdlib.h>//system

class OpaqueClass
{
public:
  OpaqueClass(const char* name) : mName(name) {}

	void CallMe(char* a, int b)
	{
		printf( "%s's CallMe called with (%s, %d)!\n", mName, a, b);
	}
private:
	const char* const mName;
};

void (OpaqueClass::* memberFuncPtr)(char*, int) = &OpaqueClass::CallMe;
void* funcToCall = (void*&) memberFuncPtr;

void CallFunc(void* obj, char* a, int b)
{
	__asm
	{
		mov ecx, obj ; this-pointer goes to ECX
		push b ; push right to left
		push a
		call funcToCall
	}
}


int _tmain(int argc, _TCHAR* argv[])
{
	OpaqueClass obj("Object");
	CallFunc(&obj, "foo", 42);
	system("pause");
	return 0;
}