MCI_PAUSE Return Value - rc

rc (ULONG)

Return codes indicating success or failure:

MCIERR_SUCCESS

If the function succeeds, 0 is returned.
MCIERR_INVALID_DEVICE_ID
The device ID is not valid.
MCIERR_INSTANCE_INACTIVE
The device is currently inactive. Issue MCI_ACQUIREDEVICE to make device ID active.
MCIERR_UNSUPPORTED_FLAG
Given flag is unsupported for this device.
MCIERR_INVALID_CALLBACK_HANDLE
Given 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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