Re: Own commands for "Text Highlight Color" and "Font Color" buttons

Hello,

Please see the RichTextBoxExtended file's OnApplyBackgroundCanExecute and OnApplyBackgroundExecute methods as those basically are what process that command.  The RichTextBoxExtended constructor sets them up with:

this.CommandBindings.Add(new CommandBinding(ApplicationCommands.ApplyBackground,
  OnApplyBackgroundExecute, OnApplyBackgroundCanExecute));

Then you can see how the one method calls a UpdateApplyDefaultBackgroundSmallImageSource method in that code as well.  That is what updates the image source to fill in the box in TextHighlightColor16.png.