Maximum custom window loses drop shadow effect

Question

I have a custom WPF window defined as:

Answer 1

To create a drop shadow effect whilst having the ability to re-size the form try the following:

1. Set the following properties on the window:

   • ResizeMode="CanResizeWithGrip"
   • AllowsTransparency="True"
   • WindowStyle="None"
   • Background="Transparent"
   • BorderThickness="3"

2. After the window declaration, add a Border element

3. Create a Border.Effect element inside of the border

4. For the border effect add the following:

This will create the following (without the control box in the top right):

Full XAML: