Hello Lee,
Thank you for contacting us. In order to set size of the RadPanel contained in a RadSplitContainer you can use the following snippet:
You can find more information on the topic in our
online documentation. It might be also helpful for you to see the code of the RadSpitContainer examples in our demos. The easiest way to resize the split panels on start up depending on the previous use is to save the
AbsoluteSize property in a file and then on start up to assign the property the value contained in the file.
I hope this is helpful. However, if you encounter any further difficulties, please, contact me back.
Regards,
Boryana
the Telerik team