CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           "Windows App",       /* Title Text */
           WS_CAPTION,          /* default window */
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           800,                 /* The programs width */
           600,                 /* and height in pixels */
           HWND_DESKTOP,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hThisInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );

=====================

重點在於第四個函數的設定,

不過只有設定WS_CAPTION的話,視窗上面所有的按鍵都會消失不見。

如果只有設定WS_CAPTION,記得先產生一個可以關閉視窗的按鍵。