Obtaining Parameters for I/O Requests

Warning

UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2.

The archived UMDF 1 samples can be found in the Windows 11, version 22H2 - May 2022 Driver Samples Update.

For more info, see Getting Started with UMDF.

When a driver receives an I/O request, the driver can use the following methods of the IWDFIoRequest interface to obtain parameters related to the request:

• IWDFIoRequest::GetCreateParameters or IWDFIoRequest2::GetCreateParametersEx

• IWDFIoRequest::GetDeviceIoControlParameters

• IWDFIoRequest::GetReadParameters

• IWDFIoRequest::GetWriteParameters