How to check lock status of field in current document?

Hi,

How to check the status of field in current document(master agreement), that is whether its locked or not.

I locked "Publish to Supplier" checkbox after MA is saved first time. Now, I want to check the status whether this field is locked or not in the same document.

IsLockOwner( ) is not returning the correct value. Its not giving the current document field lock status.

Is there any way to get current document field status?

Thanks,

Saloni