/*
The code in the following example associates the first drawing
 member view to an expression.
*/
#include <stdio.h>
#include <uf.h>
#include <uf_defs.h>
#include <uf_draw.h>
#include <uf_draw_types.h>
#include <uf_modl.h>
#include <uf_obj.h>
#include <uf_view.h>
void ufusr(char *param, int *retcod, int param_len)
{
    char                drawing_name [MAX_ENTITY_NAME_SIZE] = "";
    char                view_name [MAX_ENTITY_NAME_SIZE] = "";
    char                error_message[MAX_LINE_SIZE + 1] = "";
    tag_t               view_tag = NULL_TAG;
    tag_t               drawing_tag = NULL_TAG;
    tag_t               exp_tag = NULL_TAG;
    int                 ifail = 0, len;
 
    ifail = UF_initialize();
  if (!ifail)
  {
      /* Get the tag of drawing. */
      ifail = UF_DRAW_ask_current_drawing (&drawing_tag);
  }
  if (!ifail)
  {
      /* Get the name of first drawing. */
      ifail = uc5027 (drawing_tag, drawing_name, &len);
  }
  if (!ifail)
  {
      /* Get the name of the drawing's first view. */
      ifail = uc6499 (drawing_name, view_name);
  }
  if (!ifail)
  {
      /* Get the view's tag. */
      ifail = UF_VIEW_ask_tag_of_view_name (view_name,&view_tag);
  }
  if (!ifail)
  {
      /* Create an expression. */
      ifail = UF_MODL_create_exp_tag ("1.5", &exp_tag);
  }
  if (!ifail)
  {
      /* Set the parametric view scale. */
      ifail = UF_DRAW_set_view_parm_scale (view_tag, exp_tag);
  }
  printf ("UF_DRAW_set_view_parm_scale sample ");
  if (ifail)
  {
      ifail = UF_get_fail_message( ifail, error_message );
      printf( "fails.\nError is: %s\n", error_message );
  }
  else
      printf( "is successful.\n" );
  UF_terminate();
}