This message is sent to IPF by the application to set the size of the coverpage, the window within which all other IPF windows are displayed.

param1
    PRECTL  coverpagerectl  /*  Pointer to RECTL containing the size of the coverpage. */

param2
    ULONG   ulReserved      /*  Reserved value, should be 0. */

returns
    ULONG   rc              /*  Return code. */