Hello world - Win32 API

/*
Chương trình đầu tiên Win32 API hello world :D
*/
#include "windows.h"

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
{
    MessageBox(NULL,L"Hello World!",L"Win32 Application",0);
    return 0;
}