自律2019 于 2019-09-12 14:52:56 发布FormBorderStyle.None时，支持改变窗体大小
注意事项：
1.事件必须加载Form的move上
2.Form被其他控件覆盖时，不会响应，所以设置Padding 属性为1 或者2
const int WM_NCHITTEST = 0x0084; const int HTLEFT = 10; const int HTRIGHT = 11; const int HTTOP = 12; const int HTTOPLEFT = 13; const int HTTOPRIGHT = 14; const int HTBOTTOM = 15; const int HTBOTTOMLEFT = 0x10; const int HTBOTTOMRIGHT = 17; protected override void WndProc(ref Message m) { base.WndProc(ref m); switch (m.Msg) { case WM_NCHITTEST: Point vPoint = new Point((int)m.LParam & 0xFFFF, (int)m.LParam >> 16 & 0xFFFF); vPoint = PointToClient(vPoint); if (vPoint.X <= 5) if (vPoint.Y <= 5)
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