Blending ellipse over a rectangle

[InertiaM]

Is it possible to draw two items (for example, a rectangle and an ellipse) and where the fill colours meet, create a blend rather than overlay

Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim p As New Pen(Color.Black)
        With e.Graphics
            .FillRectangle(Brushes.LightGray, 50, 50, 200, 200)
            .DrawRectangle(p, 50, 50, 200, 200)

            .FillEllipse(Brushes.LightBlue, 150, 150, 150, 150)
            .DrawEllipse(p, 150, 150, 150, 150)
        End With
        p.Dispose()
    End Sub

I know I can show the outline through, by drawing the "fills" first and then the "strokes", but this doesnt help with the colour blend.

 

[JohnH]

The graphics CompositingMode is already SourceOver so all you have to do is provide a semitransparent color:

Dim b1 As New SolidBrush(Color.FromArgb(123, Color.LightGray))

The colors change with the transparency to lighter, but you can adjust to a darker color if needed.

 

[InertiaM]

Perfect - thanks John