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The TixExFileSelectDialog Widget 

The TixExFileSelectDialog widget is very similar to the TixFileSelectDialog widget. It supports all the options and widget commands of the latter, so essentially we can just take the program 5-1 and replace the command tixFileSelectDialog in the first line to tixExFileSelectDialog.

The composition of the TixExFileSelectDialog widget is a bit different: it contains one contains one subwidget, which is also called fsbox, of the type TixExFileSelectBox widget (figure 5-3). Again this fsbox widgets supports all widget options and commands of the fsbox subwidget in TixFileSelectDialog, so the line 2 of program 5-1 can work for TixExFileSelectDialog widgets without any change.