) Call CTMMSYS.SYS entry point with: AX = ??? STACK: WORD ??? WORD ??? WORD ??? (0001h,0002h,0005h,0006h) WORD ??? DWORD -> ??? WORD ??? WORD ??? Return: DX:AX = ??? or error code 0000h:000Bh invalid value for ??? 0000h:000Fh API call already in progress SeeAlso: #01507