>>When I enter the textbox on my toolbar the paste button does not highlight. If it is already highlighted because I had focus on a pasteable target in my main window it stays highlighted. But pressing it pastes to the main window textbox not to the toolbar textbox.
>
>The scenario I was thinking of was something like

><Window>
><StackPanel FocusManager.IsFocusScope="true">
><Button Command="ApplicationCommands.Save" />
></StackPanel>
><StackPanel FocusManager.IsFocusScope="true">
><TextBox x:Name="T1"/>
></StackPanel>
><StackPanel FocusManager.IsFocusScope="true">
><TextBox x:Name="T2" />
></StackPanel>
></Window>

and which textbox becomes the CommandTarget.

Answer = Neither

Both have been removed from the focus scope of the window.

Change ApplicationCommands.Save to ApplicationCommands.Paste (the textbox has built in handlers for that command) dump it on a form and you will see what I mean.