WdfDriverRetrieveDriverDataDirectoryString function

10/19/2018
2 minutes to read

[Applies to UMDF only]

The WdfDriverRetrieveDriverDataDirectoryString method returns a path to a directory on disk in which the driver can store information. The files in that directory apply to a specific framework driver object.

Syntax

NTSTATUS WdfDriverRetrieveDriverDataDirectoryString(
  WDFDRIVER Driver,
  WDFSTRING String
);

Parameters

Driver

[In] A handle to the driver's framework driver object that the driver obtained from a previous call to WdfDriverCreate or WdfDeviceGetDriver.

String

[In] A handle to a framework string object that the driver obtained from a previous call to WdfStringCreate. The framework assigns the fully qualified path of the requested driver directory to the string object.

Return Value

WdfDriverRetrieveDriverDataDirectoryString returns STATUS_SUCCESS if the operation succeeds. Otherwise, this method returns an appropriate NTSTATUS error code. For more information, see NTSTATUS Values.

Remarks

To achieve the same result, a KMDF driver should call IoGetDriverDirectory instead.

For more information about string objects, see Using String Objects.

Examples

The following code example shows how to call WdfDriverRetrieveDriverDataDirectoryString:

NTSTATUS status;
WDFSTRING string;

status = WdfStringCreate(
                         NULL,
                         WDF_NO_OBJECT_ATTRIBUTES,
                         &string
                         );
if (NT_SUCCESS(status)) {
    status = WdfDriverRetrieveDriverDataDirectoryString(
                         Driver,
                         string
                         );
    if (!NT_SUCCESS(status)) {
        return status;
    }
}

Requirements


Minimum UMDF version	2.27
Header	wdfdriver.h
IRQL	PASSIVE_LEVEL