Hi R.H.B. Haukes,
Thank you for the questions.
In order to set custom text to the TabItem of the HostWindow that hosts your form, you can use the following pattern:
.radDock1.DockControl(f, DockPosition.Fill, DockType.Document)
hostW.Text = strPage
As to your second question, please note that you should create a new instance of your form each time AddPage is called. If you use only one form instance, it will not be added to the second HostWindow as it has already been added to the first HostWindow:
I hope this helps.
the Telerik team
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