How to change mouse cursor to standard hand cursor

[Sam Varshavchik]

Cosmin Apreutesei writes:

> > You may want to check the documentation for your desktop manager.
>
> How can I detect at runtime which desktop manager is running so I can
> take it from there?

Desktop managers typically set their own desktop manager-specific properties  
in the root window.

The typical approach is to have a list of known properties each particular  
desktop manager, and check if it's set.