typedef struct tagRID_DEVICE_INFO {
    DWORD cbSize;
    DWORD dwType;
    union {
        RID_DEVICE_INFO_MOUSE mouse;
        RID_DEVICE_INFO_KEYBOARD keyboard;
        RID_DEVICE_INFO_HID hid;
    };
} RID_DEVICE_INFO, *PRID_DEVICE_INFO, *LPRID_DEVICE_INFO;