//docs/MPGui.doc/SetMPGuiGadgetValue

   NAME   
  SetMPGuiGadgetValue -- Sets the value of an MPGui gadget. (V3)

   SYNOPSIS
  succ = SetMPGuiGadgetValue( gh, Title, Value)
  D0                          A0  A1     A2

  BOOL SetMPGuiGadgetValue( struct MPGuiHandle *, char *, char *);

   FUNCTION
  Sets the value of a gadget currently being displayed by
  SyncMPGuiRequest().

   INPUTS
  gh    - MPGuiHandle being displayed by SyncMPGuiRequest().
  Title - Title of the gadget as in the input file.
  Value - Value of the gadget.
          Y/N for a CHECKs.
          A String for Strings/Files/Modes.
          A String (which is converted using strtol) for Numbers/Sliders.
          A value or number in the list/cycle for lists/cycles.
          Values strung together sperated by space for an MLIST gadget

   RESULT
  error - 1 for success, 0 for failure.
          Error means gadget not found or Value not found.

   EXAMPLE

   NOTES
  Title must be exact including "_" as required.

  This should be called from a MPG_MENUHOOK supplied to AllocMPGuiHandle().
  e.g. If a Reset To Defaults... menu item is called.

  BUTTON gadgets can not have there attributes set.

   BUGS
  For an MLIST gadget if a value is a substring of another gadget then the
  value can be incorrectly set.

  MTEXT/TEXT gadgets can not be updated.

   SEE ALSO
  SyncMPGuiRequest().