ultrix man page for xtnumber

XtOffset(3Xt)							     MIT X11R4							     XtOffset(3Xt)

Name
       XtOffset, XtNumber - determine the byte offset or number of array elements

Syntax
       Cardinal XtOffset(pointer_type, field_name)
	  Type pointer_type;
	  Field field_name;

       Cardinal XtNumber(array)
	  ArrayVariable array;

Arguments
       array	 Specifies a fixed-size array.

       field_name
		 Specifies the name of the field for which to calculate the byte offset.

       pointer_type
		 Specifies a type that is declared as a pointer to the structure.

Description
       The macro is usually used to determine the offset of various resource fields from the beginning of a widget and can be used at compile time
       in static initializations.

       The macro returns the number of elements in the specified argument lists, resources lists, and other counted arrays.

See Also
       XtGetResourceList(3Xt), XtSetArg(3Xt)
       X Window System Toolkit: The Complete Programmer's Guide and Specification, Paul J. Asente and Ralph Swick
       X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys

																     XtOffset(3Xt)