Next is the user interface; something I know small. I ask you to point me at existing samples of code demonstrating robust database transaction user interfaces with error handling.

Update: I am looking for examples of what you consider good code for GUI's to handle database transactions. My request was meant to go far beyond just recommendations of GUI toolkits. I am looking for examples of their usage dealing with database failures of various sorts and what states in the UI follow therefrom.

I am not too interested in web interfaces at present because I haven't seen any web entry forms that seem suitable for busy data entry where a moderate learning curve is acceptable. Correct me as necessary.

Raw candidates, so far, for toolkits are Tk, Wx and Gtk; and I am open to other recommendations.

Be well.

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