You can download a new version of Planner.NET from the following link:

https://mindfusion.org/_planner/_Planner.NET_41_trial16.zip

The Calendar class now exposes a new property - ToolTip, which provides access to the underlying ToolTip component.

Important Note: The Planner.NET (along with other MindFusion controls) undergoes significant changes, which are present in the above version and will be introduced with the next official release. The major change is that certain classes are separated from the Calendar.dll assembly and placed in another assembly - MindFusion.Common.dll. To be able to use these classes you should add a reference to the MindFusion.Common.dll file in your project. This is automatically done when a new instance of the Calendar control is placed on a form, but I assume you already have a working application.
Also keep in mind that both Calendar.dll and MindFusion.Common.dll will likely change until the next official release.

Meppy