大侠，help me! createfile的问题

我用的guid方式得到createfile的第一个参数，和注册表中对照了一下，完全相同。但就是返回句柄0xffffffff，用getlasterro返回值是1（不正确的函数）？？？
怎么回事阿？
另外负上我的createfile函数以及驱动中的dispatchcreate。HANDLE OpenDriver(DWORD instance)
{
HANDLE hDriver;
hDriver=0;
    LPGUID pGuid=(LPGUID)&Control_GUID;
DWORD ERRO;
HDEVINFO info = SetupDiGetClassDevs(pGuid, NULL, NULL, DIGCF_PRESENT | DIGCF_INTERFACEDEVICE);
if(info==INVALID_HANDLE_VALUE)
{
hDriver=NULL;
return hDriver;
}
SP_DEVICE_INTERFACE_DATA ifdata;
ifdata.cbSize = sizeof(ifdata);
if(!SetupDiEnumDeviceInterfaces(info, NULL, pGuid, instance, &ifdata))
{
ERRO=GetLastError();
SetupDiDestroyDeviceInfoList(info);
hDriver=NULL;
return hDriver;
}
DWORD ReqLen;
SetupDiGetDeviceInterfaceDetail(info, &ifdata, NULL, 0, &ReqLen, NULL);
PSP_DEVICE_INTERFACE_DETAIL_DATA ifDetail = (PSP_INTERFACE_DEVICE_DETAIL_DATA)(new char[ReqLen]);

if( ifDetail==NULL)
{
SetupDiDestroyDeviceInfoList(info);
hDriver=NULL;
return hDriver;
}

ifDetail->cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA);

if( !SetupDiGetDeviceInterfaceDetail(info, &ifdata, ifDetail, ReqLen, NULL, NULL))
{
SetupDiDestroyDeviceInfoList(info);
delete ifDetail;
hDriver=NULL;
return hDriver;
}
hDriver = CreateFile( ifDetail->DevicePath,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL,
NULL);
if(hDriver==INVALID_HANDLE_VALUE)
{
ERRO=GetLastError();
hDriver = NULL;
delete ifDetail;
SetupDiDestroyDeviceInfoList(info);
   return hDriver;
}
delete ifDetail;
SetupDiDestroyDeviceInfoList(info);
    return hDriver;
}


下面是dispatchcreate,很简单

NTSTATUS DispatchCreate(IN PDEVICE_OBJECT fdo, IN PIRP Irp)
{
PAGED_CODE();

DebugPrintMsg(\"Entry Cerate Dispatch Section!\");//Debug

NTSTATUS status=STATUS_SUCCESS;
    PIO_STACK_LOCATION stack=IoGetCurrentIrpStackLocation(Irp);

DebugPrint(\"Create File Name is %T\", &(stack->FileObject->FileName));//Debug

Irp->IoStatus.Status=status;
Irp->IoStatus.Information=0;
IoCompleteRequest(Irp,IO_NO_INCREMENT);

return status;
}

你的OpenDriver就是《WINDOWS WDM设备驱动程序开发指南》里面的GetDeviceViaInterface吧，如果这样的话这个函数就没问题了

你在AddDevice里是否用IoRegisterDeviceInterface正确注册了设备接口？

[编辑 -  5/16/03 by  AthlonXP]

当然用了，没用的话早在SetupDiEnumDeviceInterfaces那一步都通不过了

没用人知道么，好凄惨啊～～又得忍受唐僧老板鸡婆一天了

我的都是好好的啊，要不你把代码email我看看