The DDEML_MSG_HOOK_DATA structure contains information about a DDE message, and provides read access to the data referenced by the message. This structure is intended to be used by a DDE Management Library (DDEML) monitoring application.
typedef struct tagDDEML_MSG_HOOK_DATA { // dmhd 
    UINT  uiLo; 
    UINT  uiHi; 
    DWORD cbData; 
    DWORD Data[8]; 
} DDEML_MSG_HOOK_DATA; 
 
  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in ddeml.h.
Dynamic Data Exchange Management Library Overview, Dynamic Data Exchange Management Structures, MONCBSTRUCT, MONCONVSTRUCT, MONERRSTRUCT, MONHSZSTRUCT, MONLINKSTRUCT, MONMSGSTRUCT