急问:INF中有多个SERVICE,为什么?

有的INF文件中有多个SERVICE,请问它们的功能各是什么?0x0000,0x0002有什么区别?谢谢!!
[ThSerMux.NT.Services]
AddService = ThSerMux, 0x00000000 , ThSerMux_Service_Inst, ThSerMux_EventLog_Inst
AddService = ThSerial, 0x00000002 , ThSerial_Service_Inst, ThSerial_EventLog_Inst

;$$$Co_Sermux$$$  ; This tag is needed to trigger the device class
;
; Thesycon Serial Multiplexer
;
; Installation file (.inf) for the Sermux Port Driver
;
; (c) Copyright 2004 Thesycon
;

[Version]
Signature="$Windows NT$"
Provider=%S_Povider%
ClassGUID={50906cb8-ba12-11d1-bf5d-0000f805f530}
Class=MultiportSerial
CatalogFile=thsermux.cat
DriverVer=04/29/2005,1.20.0.0


;
; Driver information
;

[Manufacturer]
%S_Mfg%=_Devices

[_Devices]
; test device
%S_Device1%=ThSerMux,"PCMCIA\GENERIC-MODEM:_MD55X-3D3A"
%S_Device1%=ThSerMux,"GENERIC-MODEM:_MD55X-015D-4C45"

;
; General installation section
;

[ThSerMux.NT]
CopyFiles=_CopyFiles_sys
AddReg=_AddReg_SW

[ThSerMux.NT.HW]
AddReg = _AddReg_HW

;
; Service Installation
;

[ThSerMux.NT.Services]
AddService = ThSerMux, 0x00000000 , ThSerMux_Service_Inst, ThSerMux_EventLog_Inst
AddService = ThSerial, 0x00000002 , ThSerial_Service_Inst, ThSerial_EventLog_Inst

[ThSerMux_Service_Inst]
ServiceType    = 1                  ; SERVICE_KERNEL_DRIVER
StartType      = 3                  ; SERVICE_DEMAND_START
ErrorControl   = 0x1                ; SERVICE_ERROR_NORMAL
ServiceBinary  = %12%\thsermux.sys


[ThSerMux_EventLog_Inst]
AddReg = ThSerMux_EventLog_AddReg

[ThSerMux_EventLog_AddReg]
HKR,,EventMessageFile,0x00020000,"%SystemRoot%\System32\IoLogMsg.dll;%SystemRoot%\System32\drivers\thsermux.sys"
HKR,,TypesSupported,%REG_DWORD%,7

[ThSerial_Service_Inst]
ServiceType    = 1                  ; SERVICE_KERNEL_DRIVER
StartType      = 3                  ; SERVICE_DEMAND_START
ErrorControl   = 0x1                ; SERVICE_ERROR_NORMAL
ServiceBinary  = %12%\thserial.sys


[ThSerial_EventLog_Inst]
AddReg = ThSerMux_EventLog_AddReg

[ThSerial_EventLog_AddReg]
HKR,,EventMessageFile,0x00020000,"%SystemRoot%\System32\IoLogMsg.dll;%SystemRoot%\System32\drivers\thserial.sys"
HKR,,TypesSupported,%REG_DWORD%,7


[_AddReg_SW]
; is a serial port
HKR,,PortSubClass,1,01
; property page, system default
HKR,,EnumPropPages32,,"MsPorts.dll,SerialPortPropPageProvider"


[_AddReg_HW]
HKR,,"UpperFilters", REG_MULTI_SZ, thsermux

; parameter of the card
; the frequency of the card oszillator
HKR,,ClockRate,%REG_DWORD%,14745600
; the card is not turned off if the last virtual port is closed
; if this parameter is set to 0
HKR,,EnablePowerManagement,%REG_DWORD%,1
HKR,,PowerPolicyOwner,%REG_DWORD%,0

; paramters for the modem
HKR,,VirtualChannels,%REG_DWORD%,4
HKR,,BaudRate,%REG_DWORD%,230400
HKR,,MaximumFrameSize,%REG_DWORD%,127
; timeout values
HKR,,T1,%REG_DWORD%,50
HKR,,T2,%REG_DWORD%,90
HKR,,T3,%REG_DWORD%,10
HKR,,Retransmissions,%REG_DWORD%,3
HKR,,MSCEnable,%REG_DWORD%,1
HKR,,FlowControlEnable,%REG_DWORD%,1
HKR,,PNEnable,%REG_DWORD%,0
HKR,,PriorityEnable,%REG_DWORD%,0
HKR,,FConoffEnable,%REG_DWORD%,0
HKR,,PowerSaveEnable,%REG_DWORD%,0
HKR,,WakeUpTime,%REG_DWORD%,5000

; setting for DLC1
HKR,DLC1,MaximumFrameSize,%REG_DWORD%,1500
HKR,DLC1,T1,%REG_DWORD%,50
HKR,DLC1,Retransmissions,%REG_DWORD%,3
HKR,DLC1,Priority,%REG_DWORD%,63

; setting for DLC2
HKR,DLC2,MaximumFrameSize,%REG_DWORD%,1500
HKR,DLC2,T1,%REG_DWORD%,50
HKR,DLC2,Retransmissions,%REG_DWORD%,3
HKR,DLC2,Priority,%REG_DWORD%,63


[DestinationDirs]
DefaultDestDir   = 12
_CopyFiles_sys = 12

;
; Source file information
;

[SourceDisksNames.x86]
1 = %DiskId1%,,,""

[SourceDisksFiles]
thsermux.sys = 1,,
thserial.sys = 1,,

[_CopyFiles_sys]
thsermux.sys
thserial.sys

[ThSerMux.NT.LogConfigOverride]
LogConfig=ComPortConfigurationOverride

[ComPortConfigurationOverride]
ConfigPriority=NORMAL
IOConfig  = 8@0-FFFF%FFF8
IRQConfig = 3,4,5,6,7,9,10,11,12,13,14,15
MemConfig = 1000@0-FFFFFFFF%FFFFF000(RWD)    ;Allows access to DIO on VPU16550
PcCardConfig=45(A)


[Strings]
;
; Localizable Strings
;
S_Device1 = "Serial Multiplexer Driver"
DiskId1 = "Thesycon Sermux Driver Disk"
S_Mfg = "Thesycon GmbH"
S_Povider = "Thesycon GmbH"


;
; Non-Localizable Strings, DO NOT MODIFY!
;
REG_SZ         = 0x00000000
REG_MULTI_SZ   = 0x00010000
REG_EXPAND_SZ  = 0x00020000
REG_BINARY     = 0x00000001
REG_DWORD      = 0x00010001

麻烦把[Manufacturer] Section 之后的都贴出来,
要不你自己对MSDN,光这两行要别人无法看啊

INF AddService Directive
[DDInstall.Services]
 
AddService=ServiceName,[flags],service-install-section[,
             event-log-install-section[,[EventLogType][,EventName]]]

flags
Specifies one or more (ORed) of the following system-defined flags, defined in setupapi.h, expressed as a hexadecimal value:
0x00000002 (SPSVCINST_ASSOCSERVICE)
Assign the named service as the PnP function driver (or legacy driver) for the device being installed by this INF file. Do not specify this flag when installing filter drivers or other driver components not directly associated with a device. Set this flag for only one driver for each INF DDIinstall.Services section.