XtGetClassExtension(3Xt)

     NAME
          XtGetClassExtension - locate a class extension record

     SYNTAX
          XtPointer XtGetClassExtension(object_class, byte_offset
          type, version, record_size)
                WidgetClass object_class;
                Cardinal byte_offset;
                XrmQuark type;
                long version;
                Cardinal record_size;

     ARGUMENTS
          object_class
                    Specifies the widget class containing the
                    extension list to be searched.

          byte_offset
                    Specifies the offset in bytes form the base of the
                    widget class of the extension field to be
                    searched.

          type      Specifies the name of the class extension to be
                    located.

          version   Specifies the minimum acceptable version of the
                    class extension required for a match.

          record_size
                    Specifies the minimum acceptable length of the
                    class extension record required for match, or 0.

     DESCRIPTION
          The list of extension records at the specified offset in the
          specified widget_class will be searched for a match on the
          specified type, a version greater than or equal to the
          specified version, and a record size greater than or equal
          the specified record_size if it is nonzero.
          XtGetClassExtension returns a pointer to a matching
          extension record or NULL if no match is found. The returned
          extension record is owned by the widget class and must not
          be modified or freed by the caller, except possibly to be
          modified by the widget class owner.

     SEE ALSO
          X Toolkit Intrinsics - C Language Interface
          Xlib - C Language X Interface