_OVERLAPPED

Metadatacopy
struct _OVERLAPPED {
    unsigned long Internal;/* 0x0  4 */
    unsigned long InternalHigh;/* 0x4  4 */
    unsigned long Offset;/* 0x8  4 */
    unsigned long OffsetHigh;/* 0xc  4 */
    void* hEvent;/* 0x10  4 */
};
/* source: Windows 2000 RC2 DDK Alpha libcntpr.lib CodeView type records; build 2128 per the DDK's ntverp.h */