private void WDTGrid_MouseUp(object sender, MouseButtonEventArgs e)
{
WDTGrid.ReleaseMouseCapture();
}
private void WDTGrid_MouseDown(object sender, MouseButtonEventArgs e)
{
m_start = e.GetPosition(mapWindow);
m_startOffset = new Vector(tt.X, tt.Y);
WDTGrid.CaptureMouse();
}
