नोट
इस पेज तक पहुँच के लिए प्रमाणन की आवश्यकता होती है. आप साइन इन करने या निर्देशिकाओं को बदलने का प्रयास कर सकते हैं.
इस पेज तक पहुँच के लिए प्रमाणन की आवश्यकता होती है. आप निर्देशिकाओं को बदलने का प्रयास कर सकते हैं.
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.
The framework I/O request object is exposed to drivers by the IWDFIoRequest interface. It encapsulates the details of an I/O operation. All I/O requests are represented as framework I/O request objects. The reflector notifies the driver host process when the reflector receives an I/O request packet (IRP) as the result of an application I/O operation, such as, a call to the Microsoft Win32 CreateFile or ReadFile function. The framework, in response to the reflector notification, constructs a new request object and puts it in the appropriate I/O queue. The queue configuration and the locking model chosen by the user-mode driver determine when the request is presented to the driver. For more information, see Configuring Dispatch Mode for an I/O Queue and Specifying a Callback Synchronization Mode.