Release 10.1A: OpenEdge Development:
Progress 4GL Reference

CANCEL-BUTTON attribute

A button widget in the frame or dialog box to receive the CHOOSE event when a user cancels the current frame or dialog box by pressing the ESC key.

Data type: WIDGET-HANDLE

Access: Readable/Writeable

Applies to: DIALOG-BOX widget, FRAME widget

Any other action normally associated with the ESC key is not performed. The ESC key is any key associated with the ESC key label.

The CANCEL-BUTTON attribute for frames is not supported in character mode.

Note: If the user presses ESCAPE in a frame that has no such cancel button and the frame is part of a frame family, Progress applies the CHOOSE event to the first cancel button it finds within the frame family in random order.