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What are the TX and Rx public functions for USB VCP on F4 discovery?

Question asked by anton.bogdan on Aug 25, 2014
Hi, i recently restarted the atempt to configure the stm32f407VG discovery board as a virtual com port.
Now its detected ok by windows 7, i can see it in the device manager, looks like the usb is initialized corectly.
But my question is what are the public functions to send or recive data via vcp?
Tryied the
and VCP_DataTx (uint8_t* Buf, uint32_t Len)
but the complier says

"Error[Li005]: no definition for "VCP_DataTx" [referenced from C:\Users\moro\Desktop\discovery F4\inemo august\Debug\Obj\main.o] "

I am guesing that these are private functions, thats why i ask, what are the public functions for tx and rx ?
I am using usb lib  STM32_USB-Host-Device_Lib_V2.1.0
Bellow is atached a picture with the code setup and the workspace files ( tryied from the EWARM st example)