USB Port Monitoring Control
USB Monitoring Control - USB Device Data Monitoring ActiveX Component Library

_IMonitoringEvents.OnGetDescriptorFromInterface Method

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Declaration
Automation:
HRESULT  OnGetDescriptorFromInterface ( [in]   DateTime  time, [in]   byte  Index, [in]   byte  DescriptorType, [in]   ushort  LanguageId) ;
Parameters
time The time of the event. Index Specifies the device-defined index of the descriptor that is being retrieved or set. DescriptorType Indicates what type of descriptor is being retrieved or set. One of the following values must be specified: USB_DEVICE_DESCRIPTOR_TYPE/USB_CONFIGURATION_DESCRIPTOR_TYPE/USB_STRING_DESCRIPTOR_TYPE. LanguageId Specifies the language ID of the descriptor to be retrieved when USB_STRING_DESCRIPTOR_TYPE is set in DescriptorType. This member must be set to zero for any other value in DescriptorType.
Return Value
S_OK or standard OLE error code.
Remarks
Fired when URB packet with urb.UrbHeader.Function=URB_FUNCTION_GET_DESCRIPTOR_FROM_INTERFACE is received. See _URB_CONTROL_DESCRIPTOR_REQUEST for more details. The library decodes several parameters from this packet (see above).
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