nResult                   Exported, Numeric, User
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   Contains the exit code of the last activation.

   0             undefined
   1  IDOK      exit with the default OK Button ( or ENTER )
   2  IDCANCEL  exit with the default Cancel Button ( or ESC )

   If you press the ENTER Key, then Windows generates a WM_COMMAND 
   Message with an IDOK as a Parameter , and if you press the ESC Key, 
   Windows will send this Message with IDCANCEL as a Parameter. 

   Assume you have a dialog which has 2 Pushbuttons defined, one OK ( ID 1 ) 
   and one CANCEL ( ID 2 ). Instead of writing an ACTION clause for both 
   you can do it the good old modal Clipper way and evaluate the return 
   Code in odlg:nResult _AFTER_ the ACTIVATE DIALOG ... clause.

   For an example activate  Related Topics:  and select  DEFINE DIALOG