User Keys sometimes effectless?

[Angus]

Hi everybody,
this is referencing to the initial post http://www.hpmuseum.org/forum/thread-757.html. I think that one is a little unstructured right now so I'll keep the questions short.
One of the customized user keys I am currently working on is KS_Minus(), namely base.
Doing base calculations means homeview.

I found out that if there is an integer constant on level one the nature of being a user key is ignored and the integrated program is started. Launching it on purpose e.g. using F6 would be welcome, of course. Especially that window suffers from severe flickering. Can you turn on buffered drawing somewhere?



How can I keep the user functionality of KS_Minus when there is an integer constant as argument? (and what command would start the dialogue)


thanks a lot