Format of DELWATCH MEMDESC structure: Offset Size Description ) 00h BYTE memory type 01h protected mode (DPMS) 02h XMS 03h upper (high) memory 04h low memory 01h DWORD location (conventional memory) WORD: segment base address (XMS) WORD: XMS handle (DPMS) DWORD: DPMS memory 32-bit base address 05h DWORD length in bytes 09h DWORD allocation (conventional memory) WORD: memory block segment (XMS) WORD: XMS handle (same as location handle) (DPMS) DWORD: DPMS 32-bit handle