Pass values via button in 4GL

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Woozy
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I have a custom header/detail form, and I have included a button on the detail row that calls a second custom header/detail form.  I have a field in the header of first form that I want to pass to the header of the second form for data selection purposes. If it matters, I am using the "W" type in the $TRANS section for the button and putting the called form in the Picture area. Is there a way for me to pass a value between the two forms via the button? Thanks!
Kelly Meade
J. R. Simplot Company
Boise, ID
Woozy
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DOH!  I solved my problem with key numbers.  My brain was locked into a "code" solution rather than thinking about my other options. Basically, I created a custom key number using kndef and then referenced that key in the .scr file for the fields I wanted to pass from/to. Works like a charm!
Kelly Meade
J. R. Simplot Company
Boise, ID