Try something like this to populate the drop down:(apr is a property array for the form and tf is shortcut for thisform)
=aPrinters(.apr)
for i=1 to alen(tf.apr,1)
if substr(tf.apr[i,1],1,1)='\'
.dd1.additem('\'+tf.apr[i,1])
else
.dd1.additem(tf.apr[i,1])
endif
next
I would assume from your problem that the printers are network printers that have '\\' in the name.