Run the attached project and see the .GIF file or follow the steps below:

1. Set AssociatedKeyboardType to a control and KeyboardLayoutType to Numpad;

2. Run the application and drag the whole form to the Right edge of the screen

3. Click inside the control in order to display the RadVirtualKeyboardForm 

You will see that the VirtualKeyboardForm is not displayed under the associated control.

Workaround:

After setting the KeyboardLayoutType to Numpad, set the KeyboardForm.Size manually:

this.radVirtualKeyboardForm1.KeyboardForm.Size = this.radVirtualKeyboardForm1.KeyboardForm.VirtualKeyboard.CalculateDesiredSize().ToSize();