IOCTL_GENERICUSBFN_GET_CLASS_INFO_EX IOCTL (genericusbfnioctl.h)

This I/O control code (IOCTL) is sent by a user-mode service or application to retrieve information about a device's available pipes as configured in the registry.

Input buffer

NULL.

Input buffer length

None.

Output buffer

A USBFN_CLASS_INFORMATION_PACKET_EX that provides information about the available pipes for a device.

Output buffer length

The size of a USBFN_CLASS_INFORMATION_PACKET_EX structure.

Remarks

If this I/O control code (IOCTL) is being called synchronously, set the lpOverlapped parameter to NULL. If this IOCTL is called asynchronously, assign the lpOverlapped parameter to a pointer to an OVERLAPPED structure that contains a handle to an event object. The event objects signal when the operation is completed.

The return value is a BOOL value that indicates success or failure of the operation. TRUE indicates success, FALSE otherwise.

Requirements

Requirement Value
Header genericusbfnioctl.h (include GenericUsbFnIoctl.h)

See also

DeviceIoControl

IOCTL_GENERICUSBFN_GET_CLASS_INFO