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+
+This is an example of how to use Botan in a GUI. You need at least
+Botan 1.6.0.
+
+You'll also need GTK+ 2.x (tested with GTK+ 2.10; should work with
+most versions). Keep in mind that I was learning GTK as I was writing
+this code, so it is not exactly the best GTK code you're likely to
+see.
+
+dsa.cpp is the main GTK+ driver. It has some comments at the top which
+point out major areas of interest.
+
+gtk_ui.* implement a User_Interface object that opens up a GTK+ dialog
+box that asks the user for their passphrase. It works pretty well, the
+only major deficiency is a fixed upper limit on the size of the
+passphrase (currently 64). You may want to use this in your own code,
+assuming you use GTK. If not, it should at least provide an outline
+for writing a version for your favorite windowing system.