The best answer I got was the following:
? MoveFile( "c:\test1", "c:\test2" )
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FUNCTION MoveFile( m.lcFromFile, m.lcToFile )
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DECLARE SHORT MoveFile IN Win32API;
STRING @lpcurrentname, STRING @lpnewname
RETURN( ( MoveFile(@lcFromFile, @lcToFile) != 0 ) )