Delphi only supports Level 1 VBX controls. This means that data-aware VBX
controls *do not work* with Delphi. In general, anything that works with
Microsoft Visual C++ should be okay in Delphi. Also, some data-aware VBX
controls are sufficiently well-written that Delphi can make use of them and
simply not access the data properties. See the compatibility list in
section 3.5.