Copying a binary buffer to a TIdBytes object

I am using Indy10 with C++ builder XE2 and I want to send a packet of binary data using a UDPServer control. I have a plain buffer of data to send in an array of unsigned chars.
Can someone explain how to move data from a plain character array to a TIdBytes object

The code is as follows :

unsigned char buff[566];
TIdBytes ABuffer;

SetupBuffer(buff) // data is prepared for sending (566 bytes)

// .....  some code needed to move the buffer into the TIdBytes buffer ??

// now send the data using UDP to a remote host listening on port 10036

IdUDPServer1->SendBuffer(remotehost,10036,ABuffer);

Thanks,

Roger