Metadatacopystruct _HEAP_DESCRIPTOR_KEY { union { unsigned long Key;/* 0x0 4 */ struct { unsigned long Ignore : 8;/* 0x0:0 4 */ unsigned long EncodedCommittedPageCount : 16;/* 0x0:8 4 */ unsigned long UnitCount : 8;/* 0x0:24 4 */ };/* 0x0 4 */ };/* 0x0 4 */};