Building portable apps with portaccess unter qtk/glib

[Uwe Knietzsch <ukn jona-mission de>]

I want to build a widget to communicate over com, lpt
and usb under the cygwin32/windowsport oft glib/gtk with
a gtk-widget that set parameters for the interface, but 
plattform-independend and handle communikation.

Does a method for the gtk/lib-windowsport exist to do
this? Under linux /dev/ttyS0 work fine, but this is not
portable. I need a port-dialogue-widget, that is widely
portable.

I think is the same procedure as portaccess via a
pci-card. In linux is this only a fileoperation, but
under windowsport this part may a major problem.

best regards