MCI_MIXEVENT_PARMS Field - ulFlags

ulFlags (ULONG)

Contains one of the following values:

MCI_MIX_ATTRIBUTE

Indicates that ulAttribute, ulDeviceType, and ulValue fields are valid.
MCI_MIX_CONNECTOR
Indicates that a connector has been changed and the ulConnectorType, ulConnectorIndex, and ulConnStatus fields are valid.

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