The best answer I got was the following:

? MoveFile( "c:\test1", "c:\test2" )

********************
FUNCTION MoveFile( m.lcFromFile, m.lcToFile )
********************

DECLARE SHORT MoveFile IN Win32API;
STRING @lpcurrentname, STRING @lpnewname

RETURN( ( MoveFile(@lcFromFile, @lcToFile) != 0 ) )