Call Parameters

  Standard Interface Enhanced Interface
Function Number Must be 121
Data String See the following note
Length 1 is implied Must be 4
PS Position NA

The calling data string can contain:

Byte Definition
Standard Enhanced  
1 1 A 1-character presentation space short name (PSID)
2–4 Reserved
Note: 1-character short name of the target presentation space ID, or a blank or a null to indicate a request for the host-connected presentation space.