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     X Version 11 (1 September 1988)                 XtSetArg(Xt)



     NAME
          XtSetArg, XtMergeArgLists - set and merge ArgLists


     SYNTAX
          XtSetArg(arg, name, value)
                Arg arg;
                String name;
                XtArgVal value;

          ArgList XtMergeArgLists(args1, num_args1, args2, num_args2)
               ArgList args1;
               Cardinal num_args1;
               ArgList args2;
               Cardinal num_args2;


     ARGUMENTS
          arg       Specifies the name-value pair to set.

          args1     Specifies the first ArgList.

          args2     Specifies the second ArgList.

          num_args1 Specifies the number of arguments in the first
                    argument list.

          num_args2 Specifies the number of arguments in the second
                    argument list.

          name      Specifies the name of the resource.

          value     Specifies the value of the resource if it will fit
                    in an XtArgVal or the address.


     DESCRIPTION
          The XtSetArg function is usually used in a highly stylized
          manner to minimize the probability of making a mistake; for
          example:

          Arg args[20];
          int n;

          n = 0;
          XtSetArg(args[n], XtNheight, 100);n++;
          XtSetArg(args[n], XtNwidth, 200);n++;
          XtSetValues(widget, args, n);

          Alternatively, an application can statically declare the
          argument list and use XtNumber:

          static Args args[] = {
               {XtNheight, (XtArgVal) 100},
               {XtNwidth, (XtArgVal) 200},
          };
          XtSetValues(Widget, args, XtNumber(args));

          Note that you should not use auto-increment or auto-
          decrement within the first argument to XtSetArg.  XtSetArg
          can be implemented as a macro that dereferences the first
          argument twice.

          The XtMergeArgLists function allocates enough storage to
          hold the combined ArgList structures and copies them into
          it.  Note that it does not check for duplicate entries.
          When it is no longer needed, free the returned storage by
          using XtFree.


     SEE ALSO
          XtOffset(Xt)
          X Toolkit Intrinsics - C Language Interface
          Xlib - C Language X Interface


     (printed 2/14/90) (1 September 1988)            XtSetArg(Xt)