How to use Path?

Here is an example with the Close button:

<Style TargetType="Button" x:Key="CloseButton"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="Button"> <Grid> <Ellipse Stroke="Gray" StrokeThickness="2" Name="BG"/> <Path Stroke="Gray" StrokeThickness="2" Stretch="Fill" Name="PATH" Data="M 0 0 M 0.3 0.3 L 0.7 0.7 M 0.3 0.7 L 0.7 0.3 M 1 1"/> </Grid> <ControlTemplate.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter TargetName="BG" Property="Fill" Value="Red"/> <Setter TargetName="PATH" Property="Stroke" Value="White"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> 

Application:

 <Button Width="30" Height="30" Style="{StaticResource CloseButton}"/> 

We get:

In short: Path internal language defined. M means “go without drawing anything.” L means to draw. The resulting image is taken descriptive rectangle, and stretched proportionally to the entire size of the control.

In our case:

1. M 0 0 : put an invisible point with coordinates (0, 0)
2. M 0.3 0.3 : go to the point (0.3, 0.3)
3. L 0.7 0.7 : draw a line to the point (0.7, 0.7)
4. M 0.3 0.7 : go to the point (0.3, 0.7)
5. L 0.7 0.3 : draw a line up to (0.7, 0.3)
6. M 1 1 : go to the point (1, 1)

Steps 1 and 6 are needed so that the describing rectangle does not directly adjoin the edges of the cross.

Here is a description of the entire syntax: https://msdn.microsoft.com/en-us/library/cc189041%28v=vs.95%29.aspx