questions about (button -pageControl -chekbox)

1.  To add another 'tabsheet', right-click anywhere within the 'pagecontrol' object and select 'new page' (see the screenshot in the attachment).
2.  There is no option to 'skin' an existing button.  In addition to the default icons that MVD provides (add, edit etc etc), it is possible to add your own icons but it is not straightforward and requires a script.  A different option which I think is easier, is to use a transparent .png and associate it (using a simple script) with a button - in other words, when the user clicks the 'add'  .png, the associated 'add' button is automatically clicked;  the 'add' button can then be hidden so all the user sees is the image.   The functionality can be enhanced by using 'hints' against any object (for example, place the mouse over the 'add' image to see an explanation of its use).  Have a look at the attachment for how it's done.
3.  I would always use a 'combobox' - it is easier to create entries of 'in' and 'out'.  Using a 'checkbox' will either show values of '0' and '1' or 'Yes' and 'No' which is less user friendly.
Derek.