---
title: IOUSBDeviceCapabilityDescriptorHeader
framework: kernel
role: symbol
role_heading: Type Alias
path: kernel/iousbdevicecapabilitydescriptorheader
---

# IOUSBDeviceCapabilityDescriptorHeader

The device capability descriptor header.

## Declaration

```occ
typedef struct IOUSBDeviceCapabilityDescriptorHeader IOUSBDeviceCapabilityDescriptorHeader;
```

## Discussion

Discussion For more information about this descriptor type, see USB 3.2, 9.6.2.

## Topics

### Getting the Properties

- [bLength](kernel/iousbdevicecapabilitydescriptorheader/1546416-blength.md)
- [bDescriptorType](kernel/iousbdevicecapabilitydescriptorheader/1546316-bdescriptortype.md)
- [bDevCapabilityType](kernel/iousbdevicecapabilitydescriptorheader/1546172-bdevcapabilitytype.md)

## See Also

### Capability Descriptors

- [IOUSBPlatformCapabilityDescriptor](kernel/iousbplatformcapabilitydescriptor.md)
- [IOUSBPlatformCapabilityDescriptorPtr](kernel/iousbplatformcapabilitydescriptorptr.md)
- [IOUSBDeviceCapabilityBillboard](kernel/iousbdevicecapabilitybillboard.md)
- [IOUSBDeviceCapabilityBillboardAltConfig](kernel/iousbdevicecapabilitybillboardaltconfig.md)
- [IOUSBDeviceCapabilityBillboardAltConfigCompatibility](kernel/iousbdevicecapabilitybillboardaltconfigcompatibility.md)
- [IOUSBDeviceCapabilityBillboardAltConfigPtr](kernel/iousbdevicecapabilitybillboardaltconfigptr.md)
- [IOUSBDeviceCapabilityBillboardAltMode](kernel/iousbdevicecapabilitybillboardaltmode.md)
- [IOUSBDeviceCapabilityBillboardAltModePtr](kernel/iousbdevicecapabilitybillboardaltmodeptr.md)
- [IOUSBDeviceCapabilityBillboardPtr](kernel/iousbdevicecapabilitybillboardptr.md)
- [IOUSBDeviceCapabilityContainerID](kernel/iousbdevicecapabilitycontainerid.md)
- [IOUSBDeviceCapabilityContainerIDPtr](kernel/iousbdevicecapabilitycontaineridptr.md)
- [IOUSBDeviceCapabilityDescriptorHeaderPtr](kernel/iousbdevicecapabilitydescriptorheaderptr.md)
- [IOUSBDeviceCapabilitySuperSpeedPlusUSB](kernel/iousbdevicecapabilitysuperspeedplususb.md)
- [IOUSBDeviceCapabilitySuperSpeedPlusUSBPtr](kernel/iousbdevicecapabilitysuperspeedplususbptr.md)
- [IOUSBDeviceCapabilitySuperSpeedUSB](kernel/iousbdevicecapabilitysuperspeedusb.md)
- [IOUSBDeviceCapabilitySuperSpeedUSBPtr](kernel/iousbdevicecapabilitysuperspeedusbptr.md)
- [IOUSBDeviceCapabilityUSB2Extension](kernel/iousbdevicecapabilityusb2extension.md)
- [IOUSBDeviceCapabilityUSB2ExtensionPtr](kernel/iousbdevicecapabilityusb2extensionptr.md)

### Related Documentation

- [IOUSBDeviceCapabilityDescriptorHeader](iokit/usb_h_user-space/iousbdevicecapabilitydescriptorheader.md)