Thank you for writing.
ShapedForm treats the whole space as its client area. When you dock a control in the form, it covers the border of the window and this disables form resizing. I would suggest setting an appropriate Padding value for the form. Another option is to add and anchor a panel that will contain all controls inside the form.
I hope this helps. If you have other questions, do not hesitate to contact me.
the Telerik team
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