USB Libraries Help > USB Host Libraries > USB HID Host Mouse Driver Library > Library Interface > b) Data Types and Constants > USB_HOST_HID_MOUSE_HANDLE_INVALID Macro
MPLAB Harmony USB Stack
USB_HOST_HID_MOUSE_HANDLE_INVALID Macro

This is macro USB_HOST_HID_MOUSE_HANDLE_INVALID.

C
#define USB_HOST_HID_MOUSE_HANDLE_INVALID ((USB_HOST_HID_MOUSE_HANDLE)(-1))