IOCTL_SYSENV_QUERY_VARIABLE_INFO IOCTL (ntddsysenv.h)
Returns information about system environment variables using SysEnv device.
Major code
Input buffer
A pointer to a ULONG variable that contains the attributes of the system environment variable.
Input buffer length
Size of ULONG.
Output buffer
A pointer to a SYSENV_VARIABLE_INFO structure that contains variable information.
Output buffer length
The size of the SYSENV_VARIABLE_INFO structure.
Status block
Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status to the appropriate error condition as a NTSTATUS code.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddsysenv.h |
See also
Creating IOCTL Requests in Drivers
WdfIoTargetSendInternalIoctlOthersSynchronously