This section will deal specifically with the introduction of Xlib - the low level X library.
We will only deal with issues that affect the interfacing of Xlib with Motif and the Xt toolkit.
The Xlib handout gives details of how you create simple window applications using only Xlib.
If you use Motif then there should never be any need to resort to Xlib for window creation. Motif is far more powerful and flexible.
However for certain tasks we will have to resort to Xlib.