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) |