ch02 contains the following example programs:

xhello:		a simple hello world program using the Label widget

xgoodbye:	xhello with a callback on a PushButton widget

xsetstring: 	demonstrates how to use XtVaSetValues and how to set
		a compound string in the code.

xgetstring: 	demonstrates how to use XtVaGetValues and how to get a 
		compound string in the code.

