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@gabe wrote:
I use a message-only windows for all of my twain work in c++, works fine.
but I don’t know about using a different handle in a session – why not use the message-only window all the way?
Because at this case you can have problem with z-order position of window. And you can’t appear driver window because it window can be hidden other windows from you app.
Therefore my customers don’t appear some driver window sometimes and can’t switch to that window because that window don’t have icon in taskbar and Alt+Tab window (because F@$# driver developers disabled that features 👿 )
Please describe that problem in specification for driver developers and use different windows handlers for messages (message-only windows) and driver dialogs (standard windows).
Thanks
P.S.
If you want I can send example for reproduce this problem written on C#. That app contains 3 window: main window, modal window and “driver” window which can have or not have parent window.