INT 21 - LAN Manager Enhanced DOS - DosPeekMailslot AX = 5F51h BX = handle ES:DI -> buffer Return: CF clear if successful AX = bytes read CX = next item's size DX = next item's priority CF set on error AX = error code SeeAlso: AX=5F35h,AX=5F4Fh,AX=5F50h,AX=5F52h