JVCL Help: TJvZoom Class
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A component that can zoom in a part of the screen.
TJvZoom = class(TJvCustomControl);
Use TJvZoom when you need to provide your users with the ability to zoom in a particular part of the screen. You can set the amount of zoom by using either the ZoomLevel or ZoomPercentage properties.
You can also set a crosshair image by either setting the CrossHairPicture or the CrosshairColor and CrosshairSize properties. To activate the crosshair, set the Crosshair property to true. The crosshair image indicates in the control where the cursor is located on the screen.
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