Help !!!!!!

I am running a memory resident program which gives me weight from a scale when I press Ctrl-W on the keyboard. When I get to the weight field (Text1)in Invoice form, and press Ctrl-W, the weight then appears on this field. But when I put Keyboard "{ctrl-w}" in the got focus, or keypress of this field, nothing happens. Am I missing something, plese help.

TIA
Shafid