Techwiki:Win32k/ENGTRACKHDR
Windows XP version of ENGTRACKHDR
typedef struct tagENGTRACKHDR { /* 000 */ LIST_ENTRY Entry; /* 008 */ DWORD dwTrkType; /* 00C */ ERESOURCE eResource; // Xp Size is 56 or 0x38 } ENGTRACKHDR, *PENGTRACKHDR; // Xp Size is 72 or 0x48