is_cancel

Is_Cancel.

This attribute specifies whether the button is selected when the user presses
the cancel key (Esc or Ctrl+C). Possible values are true or false.
Default: false.
Only one button in a dialogue box can have the 'is_cancel' attribute set to true.

DCL Code Sample 

lisp49v : dialog {				//dialog name
          label = "is_cancel" ;			//give it a label

	: button {				//define button
          label = "Press Escape";		//give it a label
	  key = "cancel";			//give it a name
	  fixed_width = true;			//fix the width
	  is_cancel = true;			//make it the cancel key
	}					//end button

        }					//end dialog