Ellipse At X,Y Location

[ThatThatGuy]

This is a XAML Question

I want to draw a Ellipse when mouse is clicked on the canvas in a user control....

im setting this to put the ellipse

 Ellipse el = new Ellipse();
            el.Fill = Brushes.Black;
            el.Height = 15;
            el.Width = 15;
            el.Margin = new Thickness(e.GetPosition(objSurface).X, e.GetPosition(objSurface).Y, 0, 0);
            objSurface.Children.Add(el);

objSurface is the Canvas on which the Ellipse is to be drawn

[Plater]

So what is the problem?

[ThatThatGuy]

Now the problem in resolved....

the problem now is

I am drawing a table like layout in xaml user control.....

i use line control to draw columns ..... i give a space if 15 between each vertical line....

my question is when i try the same thing in Windows Forms using GDI+
with the space of 15px between each columns....

the distance between the vertical lines drawn in xaml and windows forms
are not the same


i know that Xaml uses DIP instead of screen pixels....

but how'd i draw lines in pixels in xaml