inf文件出错！！高手帮帮忙

我在2K下写了一个串口过滤驱动程序和它的INF文件，结果安装出错，出错信息为：error_no_associated_service
inf文件是我在WDM1例子上面改的，小弟菜鸟一个，高手帮忙啊
; Wdm1free.Inf - install information file
; Copyright ?1998,1999 Chris Cant, PHD Computer Consultants Ltd

[Version]
Signature="$Chicago$"
Class=PORTS
ClassGuid={4D36E978-E325-11CE-BFC1-08002BE10318}
Provider=%WDMBook%
DriverVer=05/19/1999,1.0.6.0

[Manufacturer]
%WDMBook% = WDM.Book

[WDM.Book]
%Wdm1%=Wdm1.Install, virtual_com

[DestinationDirs]
Wdm1.Files.Driver=10,System32\Drivers
Wdm1.Files.Driver.NTx86=10,System32\Drivers

[SourceDisksNames]
1="vserial build directory",,,

[SourceDisksFiles]
vserial.sys=1

[SourceDisksFiles.x86]
vserial.sys=1


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Windows 2000

[Wdm1.Install.NT]
CopyFiles=Wdm1.Files.Driver.NTx86

[Wdm1.Files.Driver.NT]
vserial.sys,,,%COPYFLG_NOSKIP%

[Wdm1.Install.NT.Services]
AddService = Wdm1, %SPSVCINST_ASSOCSERVICE%, Wdm1.Service

[Wdm1.Service]
DisplayName    = %Wdm1.ServiceName%
ServiceType    = %SERVICE_KERNEL_DRIVER%
StartType      = %SERVICE_DEMAND_START%
ErrorControl   = %SERVICE_ERROR_NORMAL%
ServiceBinary  = %10%\System32\Drivers\Wdm1.sys

[Wdm1.Install.NTx86.HW]
AddReg=Wdm1.Install.NTx86.HW.AddReg

[Wdm1.Install.NTx86.HW.AddReg]
HKR,,"UpperFilters", 0x00010000, "vserial"




;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
; Strings

[Strings]
WDMBook="BOYA SEUCOMM"
Wdm1="WDM Book: Wdm1 Example, free build"
Wdm1.ServiceName="VIRTUAL SERIAL  Driver"

SPSVCINST_Fliter=0x00000000 ; Driver service is associated with device being installed
COPYFLG_NOSKIP=2 ; Do not allow user to skip file
SERVICE_KERNEL_DRIVER=1
SERVICE_AUTO_START=2
SERVICE_DEMAND_START=3
SERVICE_ERROR_NORMAL=0

filter的inf没有不要写，而直接使用Api来安装就好了

filter的inf没有必要写，而直接使用Api来安装就好了

请问怎么用API安装啊？