This message is sent from the MCDs to MDM to change the class and resource units assigned to the given device context.

ulParam1 (ULONG)

This parameter can contain the following standard flag:

MCI_WAIT

This message is not to be returned until the device context resource requirements have been changed or an error is found.

pParam2 (PMCIDRV_CHANGERESOURCE_PARMS)

A pointer to the MCIDRV_CHANGERESOURCE_PARMS structure.

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