are there any plans for implementing WinCE specfic UI behaviour ? What I am thinking about for example is, that a control switches focus to the next/prev when pressing UP/DOWN as long as it doesn't capture the key (since there is no TAB) or other things like that.
Call TabulateEx method for a form and you will be able to navigate between controls using arrow keys.
Use CeFormSIPAware procedure to control SIP. Use MakeScrollable method to add scrollbar to a form.