Int 20  P - Microsoft Windows - Dwcfgmg.sys - Vxd Services                 [W]

   VxD = 0034h

Note:  the desired VxD and service number are identified by the data
     immediately following the INT 20 instruction, as in:
       INT 20h
       DW  service number
       DW  VxD identifier

See Also: INT 2F/AX=1684h"DEVICE API",INT 30"Windows",#0961,#1032

(Table 0994)
Values for DWCFGMG.SYS (VxD ID 0034h) service number:
 00h   "CM_GetVersion" get supported DDI version

   Return: EAX = 00000000h if not installed
       else
           AH = major version number
           AL = minor version number
           EBX = number of devices controlled by DWCFGMG.SYS
 01h   "CM_GetConfig" get device configuration
   EBX = device index
   EDI -> buffer for configuration information (see #2362)

   Return: EAX = status (0000h successful, 0001h index out of range)
 02h   "CM_LockConfig" lock device configuration
   EDI -> configuration information (see #2362)

   Return: EAX = status
           0000h successful
           0001h resource conflict
           0002h invalid request
 03h   "CM_UnlockConfig" unlock device configuration
   EDI -> configuration information (see #2362)

   Return: EAX = status (0000h successful, 0001h invalid request)
 04h   "CME_QueryResources"
 05h   "CME_AllocResources"
 06h   "CME_DeallocResources"

See Also: INT 2F/AX=1684h/BX=0034h