this.DoubleBuffered = true; //减少屏幕闪动
static extern bool LockWindowUpdate(IntPtr hWndLock);
void form1_ResizeBegin(object sender, EventArgs e)
void form1_ResizeEnd(object sender, EventArgs e)
A form that has a lot of controls takes a long time to paint. Especially the Button control in its default style is expensive. Once you get over 50 controls, it starts getting noticeable. The Form class paints its background first and leaves "holes" where the controls need to go. Those holes are usually white, black when you use the Opacity or TransparencyKey property. Then each control gets painted, filling in the holes. The visual effect is ugly and there's no ready solution for it in Windows Forms. Double-buffering can't solve it as it only works for a single control, not a composite set of controls. I discovered a new Windows style in the SDK header files, available for Windows XP and (presumably) Vista: WS_EX_COMPOSITED. With that style turned on for your form, Windows XP does double-buffering on the form and all its child controls.
protected override CreateParams CreateParams
CreateParams cp = base.CreateParams;
cp.ExStyle |= 0x02000000;