Creating a Framework Device Object

Every function driver, filter driver, and bus driver must create a framework device object for each instance of a supported device that is connected to the system.

Creating a framework device object involves three steps:

1. Obtaining a pointer to a WDFDEVICE_INIT structure.

   This is an opaque, system-allocated structure, into which the driver stores information about a device.

2. Initializing the WDFDEVICE_INIT structure.

   The driver calls a set of framework-supplied functions that add information to the structure.

3. Calling WdfDeviceCreate.

   The driver passes the WDFDEVICE_INIT structure's pointer to the WdfDeviceCreate method. The method creates a framework device object and uses information in the WDFDEVICE_INIT structure to initialize the object.

For more information about creating framework device objects, see the following topics:

• Creating Device Objects in a Function Driver

• Creating Device Objects in a Filter Driver

• Creating Device Objects in a Bus Driver