pDragItem (PDRAGITEM)

      Pointer to the DRAGITEM structure representing the objects to be printed.

    pPrintDest (PPRINTDEST)

      Pointer to the PRINTDEST structure representing printer object to print to.

      The structure contains all the parameters required to call the functions DevPostDeviceModes and DevOpenDC.

    ulAction (ULONG)

      Flag.

      DRR_SOURCE

        The source window procedure/object procedure will take responsibility for the print operation.
      DRR_TARGET
        The target printer object will take responsibility for the print operation (this will only work on objects which are of the pre-registered rendering method; "DRM_OS2FILE".
      DRR_ABORT
        Abort the entire DM_DROP action (do not send any more DM_PRINTOBJECT messages to any selected source object involved in this DM_DROP.

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