As a Quickwin developer I often create child windows that contain multiple regions, say a text region or graphics region as part of a gui, and I need to support keystroke navigation by the user. It is simple enough to support the <tab> key to go from one region to another, just as in a Windows dialog. But in a Windows dialog you can also use <Shift-Tab> to go backwards. In Quickwin there is apparently no way to trap this keystroke, and thus the only way to access some regions is the lengthy (irritating) process of "going round the world."
Quickwin provides the PASSDIRKEYS do intercept direction and page keys before Windows grabs them, to give the programmer (me) control over them. Surely this could be expanded to do the same for <Shift-Tab>?
There are a few other keys that would also be very good to support, but this is the most obvious one and appears to be a simple oversight.