Highlight selection with IAC and AutoHotkey

Hi,

I would like to highlight a selected text in a certain colour via shortcut (that is to say, execute the command available in the context menu of a text selection programmatically (right click on selection > Highlight text)). I have used IAC with AutoHotkey before, but I am not sure which route to take... could somebody point me to an example for text annotation creation over a selected text?

Thank you in advance for your help and suggestions.