1.4. Generic Values and Types

The following symbols are defined by Xlib and used throughout the manual:

  • Xlib defines the type Bool and the Boolean values True and False .

  • None is the universal null resource ID or atom.

  • The type XID is used for generic resource IDs.

  • The type XPointer is defined to be char* and is used as a generic opaque pointer to data.
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    Christophe Tronche, ch@tronche.com