>>While LOCATE FOR will work I need to count number of records that already locked to know how many active users are in the system. The file will never be too big, I think max number of users any of our clients have is 100 right now. Also I am using FOR.. NEXT loop because in case number of locked record reached maximum number of users I want to stop checking no matter how many records are in the table.
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>So what? You can still break out of a SCAN, just like you can break out of a FOR loop. However, my proposal - LOCATE FOR RLOCK() - would no longer be acceptable, given the requirements.

You are absolutely right, can use SCAN, but RLOCK() is still an issue.
I have hope again after Sergey found the article from Microsoft. Will let you know.