The structure of the COMM_FROM packet element is as follows:

 typedef struct _COMM_FROM {
   USHORT CommType;
   ULONG Length;
   ULONG LengthGuid;
   GUID Guid;
   ULONG LengthName;
   wchar_t Name[];
 } COMM_FROM,
  *PCOMM_FROM;

CommType: A 16-bit, unsigned integer that indicates the type of this COMM_PACKET element. MUST be set to 0x0004.

Length: A 32-bit, unsigned integer that indicates the length, in bytes, of the data following the Length field.

LengthGuid: A 32-bit, unsigned integer that indicates the length, in bytes, of the GUID field. MUST be 0x000000010.

Guid: A field of type GUID that indicates the GUID of the sending partner.

LengthName: A 32-bit, unsigned integer that indicates the length, in bytes, of the Name field, including the NULL terminator.

Name: A Unicode UTF-16 string that identifies the sending partner. MUST be a variable-length array that contains a NULL (0x0000) terminated string of 16-bit (Unicode) characters.