## Presentation Device Driver Reference for OS/2

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### PDALERTINFO Field - ulCommand

ulCommand (ULONG) Command value describing pInData if PD_RESPONSE is set.

If PD_RESPONSE is not set, ulCommand should be set to FFFFFFFF.

See BIDI Command Structures and Command Flow for a list of commands.

Note: The ulCommand field is only set for informational purposes. If the protocol converter does not know which command the data was from, it can set ulCommand to 0 (zero).