static NTSTATUS ReadRegistryEntries	(	IN PUNICODE_STRING	RegistryPath,
		IN PSERMOUSE_DRIVER_EXTENSION	DriverExtension
	)		`[static]`

Definition at line 34 of file sermouse.c.

{
    UNICODE_STRING ParametersRegistryKey;
    RTL_QUERY_REGISTRY_TABLE Parameters[2];
    NTSTATUS Status;

    ULONG DefaultNumberOfButtons = 2;

    ParametersRegistryKey.Length = 0;
    ParametersRegistryKey.MaximumLength = RegistryPath->Length + sizeof(L"\\Parameters") + sizeof(UNICODE_NULL);
    ParametersRegistryKey.Buffer = ExAllocatePoolWithTag(PagedPool, ParametersRegistryKey.MaximumLength, SERMOUSE_TAG);
    if (!ParametersRegistryKey.Buffer)
    {
        WARN_(SERMOUSE, "ExAllocatePoolWithTag() failed\n");
        return STATUS_NO_MEMORY;
    }
    RtlCopyUnicodeString(&ParametersRegistryKey, RegistryPath);
    RtlAppendUnicodeToString(&ParametersRegistryKey, L"\\Parameters");
    ParametersRegistryKey.Buffer[ParametersRegistryKey.Length / sizeof(WCHAR)] = UNICODE_NULL;

    RtlZeroMemory(Parameters, sizeof(Parameters));

    Parameters[0].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_REGISTRY_OPTIONAL;
    Parameters[0].Name = L"NumberOfButtons";
    Parameters[0].EntryContext = &DriverExtension->NumberOfButtons;
    Parameters[0].DefaultType = REG_DWORD;
    Parameters[0].DefaultData = &DefaultNumberOfButtons;
    Parameters[0].DefaultLength = sizeof(ULONG);

    Status = RtlQueryRegistryValues(
        RTL_REGISTRY_ABSOLUTE,
        ParametersRegistryKey.Buffer,
        Parameters,
        NULL,
        NULL);

    if (NT_SUCCESS(Status))
    {
        /* Check values */
    }
    else if (Status == STATUS_OBJECT_NAME_NOT_FOUND)
    {
        /* Registry path doesn't exist. Set defaults */
        DriverExtension->NumberOfButtons = (USHORT)DefaultNumberOfButtons;
        Status = STATUS_SUCCESS;
    }

    ExFreePoolWithTag(ParametersRegistryKey.Buffer, SERMOUSE_TAG);
    return Status;
}

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