WDF

As we were putting the finishing touches on the material for our new Advanced WDF Seminar, we got to discussing some details of how the EvtIoInCallerContext Event Processing Callback works. Our discussion centered around…

I admit it:  I regularly find things in WDF that I had no idea existed.  This either speaks to the overall richness of the API, or to my resolute dedication to doing things “the way I’ve always done them.”  I’m really not sure which.  Shall we vote?  No, let’s not. Anyhow, I’m working on a […]

We’re constantly learning the subtle details of how KMDF works. We came across an interesting detail today that caused us to scratch our heads to the point…

If you thought that big changes in the Windows driver arena were complete with the release of the Windows 8 WDK (which for the first time includes integration with Visual Studio)… you’d be WRONG. The WDK Team continues to surprise and amaze us by making our most profound wishes true.  The latest news, announced at […]

When you learn about WdfRequestSend, you typically learn that there are three different ways that you can send a Request to an I/O Target: Sending a Request synchronously,; Sending a Request asynchronously, and telling the framework to thereafter disregard it.  This is called “Send and Forget” processing.   In this case, your driver does not receive a […]

There are three ways of describing allocated memory in WDF:  Buffers, WDF Memory Objects, and MDLs. A memory buffer in WDF is just want it is in any system:  A pointer and a length.  You get a “buffer” directly when you call functions such as WdfRequestRetrieveInputBuffer (or friends) or when you use one of the […]