取得GLUT 的glutCreateWindow的HWND

不過跟我本來想做的有點點不一樣就是了
取得GLUT 的glutCreateWindow的HWND

1.
HWND hwnd = GetActiveWindow();


2.
char name[]="mainWindow";

glutCreateWindow(name);
HWND hwnd;
hwnd=FindWindow(NULL,name);