LockNetAccessFile
function LockNetAccessFile (const FileName : string; const Key : TKey; var NetAccess : TNetAccess) : Boolean;
TNetAccess = packed record
Fh : Integer;
Key : TKey;
CheckValue : Word;
Index : Word;
end;
LockNetAccessFile locks an access slot in the network access file specified by FileName and returns false if an error occurs.
This routine is defined in the OgNetWrk unit.