Format  void CPK_Change (void)
 Input  None
 Output  None
 Function value  None
 Function  Stops the movie currently playing and plays the movie registered with CPK_EntryNext
  will start. 

  Format  CpkChangeStatus CPK_CheckChange (void)
 Input  None
 Output  None
 Function value  Forced switchability check value
 Function  Returns the possibility of switching when forcibly switching with CPK_Change. 

  Format  void CPK_DecodeFrame (CpkHn cpk, Sint32 frame_no)
 Input  cpk: Movie handle
  frame_no: Expanded frame number
 Output  None
 Function value  None
 Function  Expands the specified frame image.
 Remarks  This function can only be used for movies loaded in memory.
  Load the movie file in the application program,
  Create a movie handle with CPK_CreateMemMovie, then call this function.
Please  .
  For movie handles created with CPK_CreateGfsMovie and CPK_CreateStmMovie,
  This function cannot be used.
  Please use a movie file with only soundless keyframes.