= FORM_DONE_LEFT_ARROW =

FORM_DONE_LEFT_ARROW is a defined value for the nData parameter of a form done event to indicate the form was exited by means of the left arrow navigation key. The event must be specified in the appropriate FORM_INIT.


== Example ==

This example shows prompting "Save Changes?" if a form is exited by ESCAPE or left arrow. If ENTER is pressed changes will be saved automatically.
{{{
EVENT(InputDone) 
{
   if(nData == FORM_DONE_ESCAPE || nData == FORM_DONE_LEFT_ARROW) 
   {
      if(pForm->IsChanged() == true)
      {
         if(WaitPrompt(LANG(STR_SAVE_CHANGES), LANG(STR_YES), LANG(STR_NO)) == true) 
         {
            IN_EVENT_WRITE_DATA;
         }
      }
   }
   return 1;
}
}}}

This example shows preventing the application from being exited by using the left arrow. It also illustrates that the application may be prevented from exiting based on a status such as if a filling event is in process.
{{{
EVENT(MainScreenDone)
{
   if(nData != FORM_DONE_ESCAPE)
   {
      ShowErrorMsg("SHIFT-ESCAPE to exit application");
      return 0;
   }

   if(mode != modeIdle)
   {
      ShowErrorMsg("Cannot exit while running");
      return 0;
   }
   return 1;
}
}}}

=== See Also === 
 
 * [wiki:FORM_DONE_ESCAPE FORM_DONE_ESCAPE]
 * [wiki:IN_EVENT_WRITE_DATA IN_EVENT_WRITE_DATA]