Bas de Bakker, you write: [about the tcl/tk binding] The Tcl/Tk binding that we wrote would certainly be improved by the changes that you suggest. If you send us a diff, we'll willingly incorporate the changes in to the distribution. :-) Thomas -- ZZ:wq! ^X^C Thomas Conway conway at cs.mu.oz.au AD DEUM ET VINUM Every sword has two edges.