In an Fl_Browser, the horizontal scrollbar can be moved to the top of the widget. The puzzler is this feature is driven by the align() value of scrollbar, not hscrollbar!

I.e. modifying test/browser.cxx as follows results in a horizontal scrollbar at the top:

  browser = new Fl_Select_Browser(0, 0, window.w(), 350, 0);
  browser->type(FL_MULTI_BROWSER);  //original
  browser->has_scrollbar(Fl_Browser_::BOTH_ALWAYS); // add this to force horizontal scrollbar
  browser->scrollbar.align(FL_ALIGN_TOP); // moves horizontal scrollbar to the top
  browser->callback(b_cb); // original

In Fl_Browser_.cxx are the following lines:

 78  if (hscrollbar.visible()) {
 79    H -= scrollsize;
 80    if (scrollbar.align() & FL_ALIGN_TOP) Y += scrollsize;
 81  }

If this is a supported feature, it seems to me line 80 should read:

 80    if (hscrollbar.align() & FL_ALIGN_TOP) Y += scrollsize;

although making this change may be a backwards compatibility issue.

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