USB Library
USB_CDC_SET_CONTROL_LINE_STATE Macro
Syntax
#define USB_CDC_SET_CONTROL_LINE_STATE 0x22    // [V24] signal used to tell the DCE device the DTE device is now present.
Description

V24] signal used to tell the DCE device the DTE device is now present.

MLA - USB Library Help Version : 2.16
http://www.microchip.com/mla