This message is sent to resume playing or recording from a paused state.

ulParam1 (ULONG)

This parameter can contain any of the following flags:

MCI_NOTIFY

A notification message will be posted to the window specified in the hwndCallback parameter of the data structure pointed to by the pParam2 parameter. The notification will be posted when the action indicated by this message is completed or when an error occurs.
MCI_WAIT
Control is not to be returned until the action indicated by this message is completed or an error occurs.

pParam2 (PMCI_GENERIC_PARMS)

A pointer to the default media control interface parameter data structure.

rc (ULONG)

Return codes indicating success or type of failure:

MCIERR_SUCCESS

If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
The device context is not valid.
MCIERR_INSTANCE_INACTIVE
The device context is currently inactive. Issue MCI_ACQUIREDEVICE to make device context active.
MCIERR_UNSUPPORTED_FLAG
Specified flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Specified callback handle is invalid.
MCIERR_UNSUPPORTED_FUNCTION
Unsupported function.
MCIERR_INVALID_FLAG
Flag (ulParam1) is invalid.
MCIERR_FLAGS_NOT_COMPATIBLE
Flags cannot be used together.

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