WdfUsbTargetDeviceGetNumInterfaces function (wdfusb.h)
[Applies to KMDF and UMDF]
The WdfUsbTargetDeviceGetNumInterfaces method returns the number of USB device interfaces that are supported by a specified USB device.
Syntax
UCHAR WdfUsbTargetDeviceGetNumInterfaces(
[in] WDFUSBDEVICE UsbDevice
);
Parameters
[in] UsbDevice
A handle to a USB device object that was obtained from a previous call to WdfUsbTargetDeviceCreateWithParameters.
Return value
WdfUsbTargetDeviceGetNumInterfaces returns the number of USB interfaces that the device supports.
A bug check occurs if a driver-supplied object handle is invalid.
Remarks
For more information about the WdfUsbTargetDeviceGetNumInterfaces method and USB I/O targets, see USB I/O Targets.
Examples
The following code example obtains the number of USB device interfaces that a specified USB device supports.
UCHAR numInterfaces;
numInterfaces = WdfUsbTargetDeviceGetNumInterfaces(UsbDevice);
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Universal |
| Minimum KMDF version | 1.0 |
| Minimum UMDF version | 2.0 |
| Header | wdfusb.h (include Wdfusb.h) |
| Library | Wdf01000.sys (KMDF); WUDFx02000.dll (UMDF) |
| IRQL | <=DISPATCH_LEVEL |
| DDI compliance rules | DriverCreate(kmdf), KmdfIrql(kmdf), KmdfIrql2(kmdf), KmdfIrqlExplicit(kmdf), UsbKmdfIrql(kmdf), UsbKmdfIrql2(kmdf), UsbKmdfIrqlExplicit(kmdf) |