WdfRegistryAssignULong - NtDoc
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headers
// wdfregistry.h
NTSTATUS WdfRegistryAssignULong(
[in] WDFKEY Key,
[in] PCUNICODE_STRING ValueName,
[in] ULONG Value
);
View the official Windows Driver Kit DDI referenceNo description available.
[Applies to KMDF and UMDF]
The WdfRegistryAssignULong method assigns a specified unsigned long word value to a specified value name in the registry.
Key [in]A handle to a registry-key object that represents an opened registry key.
ValueName [in]A pointer to a UNICODE_STRING structure that contains a value name.
Value [in]A ULONG value that will be assigned to the value name that ValueName specifies.
WdfRegistryAssignULong returns STATUS_SUCCESS if the operation succeeds. Otherwise, the method might return one of the following values:
| Return code | Description |
|---|---|
| STATUS_INVALID_DEVICE_REQUEST | WdfRegistryAssignULong was not called at IRQL = PASSIVE_LEVEL. |
| STATUS_INVALID_PARAMETER | An invalid parameter was specified. |
| STATUS_ACCESS_DENIED | The driver did not open the registry key with KEY_SET_VALUE access. |
This method also might return other NTSTATUS values.
A bug check occurs if the driver supplies an invalid object handle.
If the value name that the ValueName parameter specifies already exists, WdfRegistryAssignULong updates the value's data.
The framework sets the value's data type to REG_DWORD.
For more information about registry-key objects, see Using the Registry in Framework-Based Drivers.
The following code example assigns the constant MY_VALUE to the ValueName value, under a specified registry key.
UNICODE_STRING valueName;
NTSTATUS status;
RtlInitUnicodeString(
&valueName,
L"ValueName"
);
status = WdfRegistryAssignULong(
Key,
&valueName,
MY_VALUE
);
WdfRegistryAssignUnicodeString