Metadatacopyunion _PCW_CALLBACK_INFORMATION { struct _PCW_COUNTER_INFORMATION AddCounter;/* 0x0 16 */ struct _PCW_COUNTER_INFORMATION RemoveCounter;/* 0x0 16 */ struct _PCW_MASK_INFORMATION EnumerateInstances;/* 0x0 32 */ struct _PCW_MASK_INFORMATION CollectData;/* 0x0 32 */};