Returns a USB device's maximum packet size for the read, write, and interrupt transfer pipes associated with the specified device handle.
Input Buffer Length
Pointer to a CHANNEL_INFO structure.
Output Buffer Length
Size of the output buffer.
Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status to the appropriate error condition as a NTSTATUS code.
When the DeviceloControl function is called with the IOCTL_GET_CHANNEL_ALIGN_RQST I/O control code, the caller must specify the address of a CHANNEL_INFO structure as the function's lpOutBuffer parameter. The kernel-mode driver fills in the structure.
For more information, see Accessing Kernel-Mode Drivers for Still Image Devices.
|Header||usbscan.h (include Usbscan.h)|