thanks for asking.

You can control the virtual keyboard from outside of Remote Buddy 
using AppleScript to

- toggle

tell application "Remote Buddy" to virtualkeyboard event "toggle"

- hide

tell application "Remote Buddy" to virtualkeyboard event "hide"

- show

tell application "Remote Buddy" to virtualkeyboard event "show"

the virtual keyboard.

Enter the snippet of your choice into the "Script Editor" (/ 
Applications/AppleScript), then save it as a program bundle.

Et voilà! You have an app that you can - if I remember correctly - 
either assign to the corners of your screen using System Preferences 
or at least add to the Dock, your desktop or any app launcher you may 
be using.

Best regards, 
Felix