is_cancel = true-false;
true or false (default: false).
Specifies whether the button is selected when the user presses the ESC key. Possible values areis_cancel attribute set to true does not exit the dialog box (does not call done_dialog), the dialog box is automatically terminated after the action expression has been carried out, and the DIASTAT system variable is set to 0.
If the action expression for buttons with theis_cancel attribute set to true.
Only one button in a dialog box can have the