Randy,

I know of no way you can find out if the other user has the file exclusively, but you can find out inf anyone else has the file open;

* Save error handler
lcOnError = ON("ERROR")

* Set on error to find out if you get the file open
ON ERROR llError = .t.
llError = .f.

* Attempt to use the file exclusively
USE TheTable EXCLUSIVE

* Restore the error handler
ON ERROR &lcOnError

IF llError
  * Someone else has it in use

ELSE
   * It is not in use by anyone else but is now yours exlcusively

ENDIF