S99RB fields
Length (S99RBLN)
Verb code (S99VERB)
Flags (S99FLAG1)
Error code (S99ERROR)
Info code (S99INFO)
Text unit pointers' address (S99TXTPP)
Request block extension address (S99S99X)
Additional flags (S99FLAG2)
S99RBEND
Parent topic:
Setting up the request block