you need to make an entry in the Generals.csf file.
its located in the Data\English folder.
you need to create an entry with the title name same as what listed in your CommandButton code I.E.
DescriptLabel =
CONTROLBAR:TooltipBlahhblah
There is a tool for opening and editing this file called the CSF Editor
you can download it at my website here,(suprised Dee doesn't have it)
CSF editor