IWDFUsbTargetDevice::GetNumInterfaces method (wudfusb.h)
[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. For more info, see Getting Started with UMDF.]
The GetNumInterfaces method retrieves the number of USB interfaces for the USB device.
Syntax
UCHAR GetNumInterfaces();
Return value
GetNumInterfaces returns the number of IWDFUsbInterface interfaces for the USB device in the default configuration. The default configuration is identified by index zero.
Remarks
UMDF USB I/O target devices do not support multiple configurations.
Examples
The following code example retrieves the number of USB interfaces for the USB device.
UCHAR NumInterfaces = pIUsbTargetDevice->GetNumInterfaces();
Requirements
| Requirement | Value |
|---|---|
| End of support | Unavailable in UMDF 2.0 and later. |
| Target Platform | Desktop |
| Minimum UMDF version | 1.5 |
| Header | wudfusb.h (include Wudfusb.h) |
| DLL | WUDFx.dll |