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##

# 2.9.4.23 USB_DEVICE_PRINTER_TRANSFER_HANDLE_INVALID Macro

## C

    #define USB_DEVICE_PRINTER_TRANSFER_HANDLE_INVALID ((USB_DEVICE_PRINTER_TRANSFER_HANDLE)(-1))

## Summary

USB Device Printer Function Driver Invalid Transfer Handle Definition

This definition defines a USB Device Printer Function Driver Invalid Transfer Handle. A Invalid Transfer Handle is returned by the USB_DEVICE_Printer_Write and USB_DEVICE_Printer_Read functions when the request was not successful.

## Remarks

None.