typedef struct tagNMITEMACTIVATE
{
    NMHDR   hdr;
    int     iItem;
    int     iSubItem;
    UINT    uNewState;
    UINT    uOldState;
    UINT    uChanged;
    POINT   ptAction;
    LPARAM  lParam;
    UINT    uKeyFlags;
} NMITEMACTIVATE, *LPNMITEMACTIVATE;