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//0x28 bytes (sizeof)
struct _KTIMER
{
    struct _DISPATCHER_HEADER Header;                                       //0x0
    union _ULARGE_INTEGER DueTime;                                          //0x10
    struct _LIST_ENTRY TimerListEntry;                                      //0x18
    struct _KDPC* Dpc;                                                      //0x20
    LONG Period;                                                            //0x24
};