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The volume of a device’s audible alarm. Note that this control affects the volume of all alarms; no specific volume control for individual types of alarms is provided.
Take note of the range step, some Sources may only offer a step of 100, which turns the alarm on or off.
If 0, the audible alarm is turned off. All other values control the volume of the alarm.
Windows only - If the alarm is managed in the Source, as opposed to the device, then it should be consistent with the control panel Accessibility Options (i.e., the user should get visual notification if that is the current setting for the desktop).
Type: TW_INT
Value after MSG_OPENDS: (may be remembered from a pervious session)
After MSG_RESET/MSG_RESETALL: (selected by the data source writer)
Allowed Values: 0 - 100
MSG_GET TW_ONEVALUE TW_RANGE
MSG_GETCURRENT TW_ONEVALUE
MSG_GETDEFAULT TW_ONEVALUE
MSG_SET TW_ONEVALUE
MSG_SETCONSTRAINT TW_ONEVALUE
TW_RANGE
MSG_RESET TW_ONEVALUE
MSG_QUERYSUPPORT TW_ONEVALUE
None
Version 1.8
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