I got the same problem with importing the type library in Delphi 5.0. I assume that in Borland C++ Builder, importing the activeX type library is the same. What I did is from find the item from the menu to import the library. Find the NI UI Control activeX from the list. When it lists the classes inside the activeX in the list box, just edit them. So for example, if it lists the class TButton, just change it to TTsButton.