Theres no api for sending keys built into rb, but it is possible with C# + a code tag to send keys to a generic window. What do you want numpad0 for?
Im using a profile that is farming bicolor gemstone vouchers for me and leveling up ever class from 70->90 and im trying to make it sell the vouchers too and selecting the first retainer are my biggest problem but 2 clicks on numpad0 fixes that. I havent tested out making my ovn tags yet but will check it out tonight. Do you have any other tips about tags(quest behaviors?) beside checking the already made tags before i start?
For simple stuff you can just use a <code> block, check any of the big profiles for examples i think https://github.com/nt153133/__LlamaLibrary has some retainer stuff so you dont need to send keys to the window but 3rd party stuff is unsupported.