IIRC, ActiveX controls by default would use fonts set in the Windows current theme. Is it possible that Windows theme or Windows font settings have been changed on affected computers?

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>We're using the MS Treeview Control ActiveX and the Exontrol Date Control (http://www.exontrol.com/excalendar.jsp) for many years.
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>Sometimes our Users report to us, that suddenly the Font of ALL Active X Controls in all Forms are bold.
>Bud we do not Provide such functionality ;)
>
>Could anyone give us a hint what this can be?