I've been doing a bit of fiddling with Microsoft's beta release of Visual Basic 5.0, which makes it very easy to create ActiveX controls. Below are some samples of the experiments so far.
Here's a temperature converter that converts amongst Farenheit, Celsius, Kelvin, and Rankine. Range of temperatures is from 0 Kelvin to 32767 Kelvin, which should be enough for most people. :-)


Here's a file reader that allows you to point and click your way through your directory hierarchy and select a file to view. When you double-click on a filename, the file is read in and displayed in a multi-line textbox.

Here's yet another bouncing ball demo


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