public struct POINT{public int X;public int Y;public POINT(int x, int y){this.X = x;this.Y = y;}}[DllImport("user32.dll")]
public static extern bool GetCursorPos(out POINT lpPoint);//e.GetPosition(this);
//(e.Source as FrameworkElement).PointToScreen(new Point(0, 0));
POINT mousestart = new POINT();
GetCursorPos(out mousestart);Point p2 = Mouse.GetPosition(this as FrameworkElement);Point p = Mouse.GetPosition(e.Source as FrameworkElement);MessageBox.Show(Convert.ToString(mousestart.X));
MessageBox.Show(Convert.ToString(p.X));
MessageBox.Show(Convert.ToString(p2.X));