我写的一个驱动，在应用程序向驱动发送消息的时候，总是提示一次错误。

我的驱动部分是这样写的：
DriverObject->MajorFunction[IRP_MJ_CREATE] = MydrvDispatch;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = MydrvDispatch;
DriverObject->MajorFunction[IRP_MJ_CLEANUP] = MydrvDispatch;


static NTSTATUS MydrvDispatch (IN PDEVICE_OBJECT DeviceObject, IN PIRP Irp)
{
NTSTATUS status;
PIO_STACK_LOCATION irpSp;
UNREFERENCED_PARAMETER(DeviceObject);
irpSp = IoGetCurrentIrpStackLocation( Irp );
switch (irpSp->MajorFunction)
{
case IRP_MJ_CREATE:
DbgPrint(\"IRP_MJ_CREATE\\n\");
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0L;
break;
case IRP_MJ_CLOSE:
DbgPrint(\"IRP_MJ_CLOSE\\n\");
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0L;
break;
case IRP_MJ_CLEANUP:
DbgPrint(\"IRP_MJ_CLEANUP\\n\");
Irp->IoStatus.Status = STATUS_SUCCESS;
Irp->IoStatus.Information = 0L;
break;
}
IoCompleteRequest(Irp, 0);
return STATUS_SUCCESS;
}
请问各位大虾我这样写对吗？？

看起来好象没什么问题啊。。。。。

不过为什么要用static来申明函数？？？