| Microsoft DirectX 8.1 (C++) | 
Microsoft® DirectPlay® generates the DPN_MSGID_ASYNC_OP_COMPLETE message when an asynchronous request has completed.
The DPNMSG_ASYNC_OP_COMPLETE structure contains information for the DPN_MSGID_ASYNC_OP_COMPLETE system message.
typedef struct _DPNMSG_ASYNC_OP_COMPLETE{
    DWORD      dwSize;
    DPNHANDLE  hAsyncOp;
    PVOID      pvUserContext;
    HRESULT    hResultCode;
} DPNMSG_ASYNC_OP_COMPLETE, *PDPNMSG_ASYNC_OP_COMPLETE;
Return DPN_OK.
  Windows NT/2000/XP: Available as a redistributable for Windows 2000 and later.
  Windows 98/Me: Available as a redistributable for Windows 98 and later.
  Header: Declared in Dplay8.h.