protected override void WndProc(ref Message message)
{
base.WndProc(ref message);
if (message.Msg == 0x84) // WM_NCHITTEST
{
var cursor = this.PointToClient(Cursor.Position);
if (TopLeftGrip.Contains(cursor))
{
message.Result = (IntPtr)HTTOPLEFT;
}
else if (TopRightGrip.Contains(cursor))
{
message.Result = (IntPtr)HTTOPRIGHT;
}
else if (BottomLeftGrip.Contains(cursor))
{
message.Result = (IntPtr)HTBOTTOMLEFT;
}
else if (BottomRightGrip.Contains(cursor))
{
message.Result = (IntPtr)HTBOTTOMRIGHT;
}
else if (TopGrip.Contains(cursor))
{
message.Result = (IntPtr)HTTOP;
}
else if (LeftGrip.Contains(cursor))
{
message.Result = (IntPtr)HTLEFT;
}
else if (RightGrip.Contains(cursor))
{
message.Result = (IntPtr)HTRIGHT;
}
else if (BottomGrip.Contains(cursor))
{
message.Result = (IntPtr)HTBOTTOM;
}
}
}
private int HitTestFrame(Point point)
{
int result = 0;
if (TopLeftGrip.Contains(point))
{
result = WM.HTTOPLEFT;
}
else if (TopRightGrip.Contains(point))
{
result = WM.HTTOPRIGHT;
}
else if (BottomLeftGrip.Contains(point))
{
result = WM.HTBOTTOMLEFT;
}
else if (BottomRightGrip.Contains(point))
{
result = WM.HTBOTTOMRIGHT;
}
else if (TopLine.Contains(point) || TopGrip.Contains(point))
{
result = WM.HTTOP;
}
else if (LeftLine.Contains(point) || LeftGrip.Contains(point))
{
result = WM.HTLEFT;
}
else if (RightLine.Contains(point) || RightGrip.Contains(point))
{
result = WM.HTRIGHT;
}
else if (BottomLine.Contains(point) || (BottomGrip.Contains(point)))
{
result = WM.HTBOTTOM;
}
return(result);
}