Emulate a function key with VBScript command

[Guest_imported]

I've asked this before and couldn't make any use of the response, so I'll ask it slightly differently...
I am using an industrial control app (ABB Bailey Conductor), which is 100% suitable for mouse/touchscreen EXCEPT for an annoying need to use the "F10" key to "return to previous screen". I have watched operators control a copper smelter or a power station and they never touch the keyboard except for this...
It allows "on click" calling of VBScript subroutines. What I am after is a simple but correctly formatted subroutine to do: "SENDKEYS{"F10"}" within this application

 

[CorporateRobot]

I believe the syntax is simply:
SendKeys "F10"