Important Notice

The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

■ You tried to pass an event handler parameter by value.
  Event handler parameters are always passed by reference.
 
■ Possible solution:
 
  • Delete the BYVAL keyword from the event procedure
    declaration.
 
■ If you need additional help, move the cursor to a keyword
  and press F1 to open the Help window.