You can simply map the Virtual Keyboard's Control Key action to 
achieve what you want. RB then emulates the press and release of just 
the Ctrl key on the press and release of the remote's button.

Multiple button presses are currently not supported. You'll find a lot 
of discussion on this topic and also an explaination on why it is not 
supported at this point here in the forum. Support for multiple button 
presses is definately on the roadmap, though.

Best regards, 
Felix Schwarz