System.Windows.Forms.Control.PointToClient C# (CSharp) Method

		public Point PointToClient (Point p)
		{
			int x = p.X;
			int y = p.Y;
			return Point.Round (NSViewForControl.ConvertPointToBase (p));
		}

	    public System.Drawing.PointF GetRelativePosition(Control c) {
	    	System.Drawing.Point relPoint;
	    	System.Drawing.PointF relPointF;
	    	relPoint = c.PointToClient(new System.Drawing.Point((int)ScreenX,(int)ScreenY));
	    	relPointF = new System.Drawing.PointF(relPoint.X + ScreenX - (float)((int)ScreenX),
	    	                                      relPoint.Y + ScreenY - (float)((int)ScreenY));
	    	return relPointF;
	    }