I tried to establish a tab order of my input elements and I found out that if you have a component (with input elements) it will always go in the last place while tabbing. I mean, I have a screen with 2 input text, 1 component (with 1 combobox and 2 dropdowns) and finally a button. The tab order that I want is, first the 2 input texts, then the component and then the button. But, no matter what I do, the component always is in the last place.
I suggest adding a TabIndex property to components.