//0x58 bytes (sizeof)
struct _IO_WORKITEM
{
struct _WORK_QUEUE_ITEM WorkItem; //0x0
VOID (*Routine)(VOID* arg1, VOID* arg2, struct _IO_WORKITEM* arg3); //0x20
VOID* IoObject; //0x28
VOID* Context; //0x30
struct _ETHREAD* WorkOnBehalfThread; //0x38
ULONG Type; //0x40
struct _GUID ActivityId; //0x44
};