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Returns true if another user has changed a record since it was read from disk.
The work area you want to check.
Use CHANGE( ) to determine if another user has made changes to a record since it was read from disk. If the record has been changed, you might want to display a message to the user before allowing the user to continue.
CHANGE( ) only works with DBF tables.
For CHANGE( ) to return information, the table being checked must have a _DBASELOCK field. Use CONVERT to add a _DBASELOCK field to a table. If the table doesn't contain a _DBASELOCK field, CHANGE( ) returns false
CHANGE( ) compares the counter in the workstation's memory image of _DBASELOCK to the counter stored on disk. If they are different, the record has changed, and CHANGE( ) returns true.
You can reset the value of CHANGE( ) to false by moving the record pointer. GOTO BOOKMARK( ) rereads the current record's _DBASELOCK field, and a subsequent CHANGE( ) returns false, unless another user has changed the record in the interim between moving to it and issuing CHANGE( ).
Call rowset.fields[ "_DBASELOCK" ].update