A Tree on the backyard

The Treeviews are working in principle, just the scrollbars are not in place, The position of them is set too early, before they are created. Besides this the Trees work rather nicely also the shelltreeview. But the Edit has the same problem as in the stringgrid or valueedit. It draws not right, I didn’t find out whats wrong there the edit is completely with text on white background, only at the cursor/selection you can read the char. I still have no idea why MUI paint this in the wrong way, especially because the scrollbars are painted in the right way… very strange.