WDK Mini Filter Example
Ctx File System Minifilter Driver

The Ctx minifilter is an example that demonstrates how to attach contexts to instances, files, streams, and stream handles in your minifilter.

Universal Windows Driver Compliant

This sample builds a Universal Windows Driver. It uses only APIs and DDIs that are included in OneCoreUAP.

Design and Operation

The Ctx minifilter demonstrates how to attach and remove contexts from instances, files, steams, and stream handles. Ctx attaches a context whenever one of these objects is created. While attaching a context to a file, the sample also creates a stream and stream handle context. All contexts are ultimately deleted by the filter manager using the callback function that the Ctx minifilter provides.

For more information on file system minifilter design, start with the File System Minifilter Drivers section in the Installable File Systems Design Guide.

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