Lock table from .net

Dear all,

I'm currently facing an issue where i try to lock the VBAK table via FM ENQUEUE_EZ_VVBAKE from a C#.NET project.

 function = moRfcDestination.Repository.CreateFunction("ENQUEUE_EZ_VVBAKE");                function.SetValue("vbeln", vbeln);                function.SetValue("_SCOPE", 2);

The lock is set, but when the FM ends execution,the lock is released.

How can I set the lock and keep it for the entire execution of the windows program ?

Thank you.

Andrei