Here's my little proc for mapping a network share:

PROCEDURE mapdrive
* do mapdrive with "\\servername\sharename", "k:"
LPARAMETERS lcdrvltr, lcnetpath
DECLARE LONG WNetAddConnection IN mpr.DLL STRING@, STRING@, STRING@
retval=wnetaddconnection(@lcnetpath, CHR(0), @lcdrvltr)
*remove the registered library
CLEAR DLLS
RETURN retval
ENDPROC