PSID Handling for Functions Not Requiring Connect

Some functions can interact with a host presentation space whether it is connected or not. These functions allow you to specify the PSID in the calling data string parameter. They are as follows:

• Connect Presentation Space (1)
• Convert Position RowCol (99)
• Get Key (51)
• Post Intercept Status (52)
• Query Close Intercept (42)
• Query Host Update (24)
• Query Session Status (22)
• Start Close Intercept (41)
• Start Host Notification (23)
• Start Keystroke Intercept (50)
• Stop Close Intercept (43)
• Stop Host Notification (25)
• Stop Keystroke Intercept (53)

All except the first two of these functions allow you to specify the PSID using either:

• A letter A through Z
• A blank or a null

When there is no host-connected presentation space, the following rules apply:

• The function can interact with any host presentation space if a letter, not a blank or a null, is used to specify the PSID.
• If a blank or a null is used to specify the PSID, a return code of 1 is generated. The function does not execute.
• Using a letter to specify the PSID does not establish a host-connected presentation space, except on a connect PS request.

When there is one host-connected presentation space, the following rules apply:

• The function can interact with any host presentation space if a letter is used to specify the PSID.
• If a blank or a null is used to specify the PSID, the function operates in the presentation space identified in the most recent call to the Connect Presentation Space (1) function.
• Using a letter to specify the PSID does not change the established PSID of the host-connected presentation space, except on a connect PS request.

The following functions are available for printer sessions:

• Start Host Notification (23)
• Query Host Update (24)
• Stop Host Notification (25)