C言語をやりたいんですが

[133 うゆ ◆e6.oHu1j.o 2008/12/05(金) 03:59:13]

ほらよ！
#include <windows.h>
main(){
WNDCLASS wcex={0,DefWindowProc,0,0,0,0,0,0,0," "};
RegisterClass(&wcex);
ShowWindow(CreateWindow(" ",0,1,300,300,200,200,0,0,0,0),1);
Sleep(3000);
}