An explanation of the Circular Gauge Control for Axiom.
Circular Gauge

Circular gauge with a needle pointing to the value of the source tag. Dual or multiple nested gauges can be displayed by stacking smaller gauges on top of larger ones.
Name - The name used by the application and script to reference this control.
X - Number of pixels from the left edge of the containing panel or screen.
Y - Number of pixels from the top edge of the containing panel or screen.
Width - Width of the control in pixels.
Height - Height of the control in pixels.
SourceTag - Clicking the trend icon launches the tag browser to select a tag for value input. Clicking the trash can will delete the reference to the tag.
ScaleLow - The lowest value on the circular scale.
ScaleHigh - The highest value on the circular scale.
MajorInterval - The difference between each value on the scale.
LimitLow - Changes the portion of the circular arc below this value to the low limit color (blue).
LimitHigh - Changes the portion of the circular arc above this value to the high limit color (red).
StartAngle - The degrees clockwise from straight up, where the gauge will start.
SweepAngle - The number of degrees out of 360 the gauge will cover.
Reverse - Changes the default rotation of low to high being clockwise to counter clockwise.
TransparentBack... - Changes the gauge background to show the underlying color.
Visible - Unchecking this will hide the control. A script would be required to toggle the visibility during runtime.
OnClick - An event that occurs when the control is clicked. Clicking "<>" Creates a "CircularGauge1_Click()" script stub for this control and opens the script editor to add event scripting. Clicking the trash can will delete only the reference to the script, not the script.
OnValueChange - An event that occurs when the SourceTag value changes. Clicking "<>" Creates a "CircularGauge1_ValueChange()" script stub for this control and opens the script editor to add event scripting. Clicking the trash can will delete only the reference to the script, not the script.
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