没有边框了，没法拖动大小？
//FormBorderStyle.None时，支持改变窗体大小
# region 支持改变窗体大小
private const int Guying_HTLEFT = 10;
private const int Guying_HTRIGHT = 11;
private const int Guying_HTTOP = 12;
private const int Guying_HTTOPLEFT = 13;
private const int Guying_HTTOPRIGHT = 14;
private const int Guying_HTBOTTOM = 15;
private const int Guying_HTBOTTOMLEFT = 0x10;
private const int Guying_HTBOTTOMRIGHT = 17;
protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case 0x0084:
base.WndProc(ref m);
Point vPoint = new Point((int)m.LParam&0xFFFF,(int)m.LParam >> 16&0xFFFF);
vPoint = PointToClient(vPoint);
if (vPoint.X <= 5)
if (vPoint.Y <= 5)
m.Result = (IntPtr)Guying_HTTOPLEFT;
else if (vPoint.Y >= ClientSize.Height - 5)
m.Result = (IntPtr)Guying_HTBOTTOMLEFT;
else
m.Result = (IntPtr)Guying_HTLEFT;
else if (vPoint.X >= ClientSize.Width - 5)
if (vPoint.Y <= 5)
m.Result = (IntPtr)Guying_HTTOPRIGHT;
else if (vPoint.Y >= ClientSize.Height - 5)
m.Result = (IntPtr)Guying_HTBOTTOMRIGHT;
else
m.Result = (IntPtr)Guying_HTRIGHT;
else if (vPoint.Y <= 5)
m.Result = (IntPtr)Guying_HTTOP;
else if (vPoint.Y >= ClientSize.Height - 5)
m.Result = (IntPtr)Guying_HTBOTTOM;
break;
case 0x0201://鼠标左键按下的消息
m.Msg = 0x00A1; //更改消息为非客户区按下鼠标
m.LParam = IntPtr.Zero; //默认值
m.WParam = new IntPtr(2); //鼠标放在标题栏内
base.WndProc(ref m);
break;
default:
base.WndProc(ref m);
break;
}
}
#endregion
