Hi Jim;

   Please use something like this to process the CheckBox (example code on "clicked event" of CBX) ...

IF THIS.thirdstate = TRUE THEN
   // Do something
else
   IF THIS.checked = TRUE THEN
      // Do another thing
   ELSE
      // Do last thing
   END IF
END IF


HTH
Regards ... Chris

Jim -

   Whatversion of PB are you suing, and what is actualloy happening when the box is clicked the first time, second time, and third time?

Olan