#include <windows.h>

void mbox(char *msg, ...)
{
    va_list arg_list;
    va_start(arg_list, msg);
    
    char buf[50];
    
    sprintf(buf, msg, arg_list);
    
    va_end(arg_list);
    
    MessageBox(NULL, buf, "Message Box of Doom", MB_OK | MB_ICONEXCLAMATION);
}

int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hprevinstance, LPSTR lpcmdline, int ncmdshow)
{
    mbox("The answer to everything is %i", 42);
}