Winfrom 限制窗体在屏幕内

public class BaseForm: Form
{
private Point _mouseDownPos;
protected bool _move;

protected override void WndProc(ref Message m)
{
RECT nativeRect;
switch (m.Msg)
{
case 0x20:
int lp = m.LParam.ToInt32();
if ((lp & 0xFFFF) == 2 &&
((lp >> 0x10) & 0xFFFF) == 0x20

Winfrom 限制窗体在屏幕内最先出现在Python成神之路。