窗体的3种显示效果，闪烁、透明、抖动。运行后，对话框上有4个按钮，点击form-flash后窗体闪烁。点击form-alpha后窗体透明。点击form-shake后窗体抖动。-Form three kinds of effects, blinking, transparency, and jitter. Running, the dialog box has four buttons, click on form after form-flash flicker. Click on form a