This Calendar Control replaces the ancient-looking one by Microsoft. It supports most functions of MS's control, and has a fully customizable appearance. The Windows XP themes are supported. Features include the ability to show weeknumbers and to navigate through the dates with the arrow keys.
The control is free to use and open-source.
The original control can be downloaded here. A version updated by Joacim Andersson with several new features, such as a way to highlight individual dates, can be downloaded here.
This ActiveX Control may be freely used and distributed in both commercial and non-commercial applications, both in text and in binary form. The control may be altered, as long as credit is given to the original author, Michiel Meulendijk.
The author holds no responsibility for any damage caused to your system because of using this ActiveX control. Use at your own risk.