  plgpage(xp, yp, xleng, yleng, xoff, yoff)
  *****************************************

  plgpage

  Gets the current page configuration.

  xp (PLINT *, output): Pointer to number of pixels in x.

  yp (PLINT *; output): Pointer to number of pixels in y.

  xleng (PLINT *, output): Pointer to x page length value.

  yleng (PLINT *, output): Pointer to y page length value.

  xoff (PLINT *, output): Pointer to x page offset.

  yoff (PLINT *, output): Pointer to y page offset.

