reqTID
MPPATPHeader #define macro
#include <AppleTalk.h>
#define MPPATPHeader Size Offset Description
QElem *qLink; 4 0 Next queue entry
short qType; 2 4 Queue type
short ioTrap; 2 6 Routine trap
Ptr ioCmdAddr; 4 8 Routine address
ProcPtr ioCompletion; 4 12 Completion routine
OSErr ioResult; 2 16 Result code
long userData; 4 18 Command result (ATP user bytes)
short reqTID; 2 22 Request transaction ID
short ioRefNum; 2 24 Driver reference number
short csCode; 2 26 Call command code
28 (size of aggregate)

Notes: MPPATPHeader is a # define'd macro that defines the fields that are
shared by some of the parameter block types used by the low level calls of
the AppleTalk Manager. These fields are placed in every parameter
block that has MPPATPHeader as a field.