ActiveX Controls In C++ Builder

One of the more complex and enigmatic areas of C++ Builder development is the use of ActiveX controls in your application. This section of the site is intended to reduce some of th mystery, with assistance from the fine folks and Borland and my TeamB colleagues.

• The Simplest ActiveX Control - Using a VCL component as the basis for an ActiveX control (8/2003)

• The Header Files From An Imported Control - what are they and what do they contain?

• Creating An Object To Pass To The Control - how can you make an object from the control's type library?

• Accessing Properties and Calling Methods Not Generated - how to access properties and methods which were not generated in the _TLB.h file, even without a DISPID.

• A Workaround For ActiveX Component Inheritance Problems In C++ Builder 4 - how to deal with problems when a component derived from your imported ActiveX component doesn't seem to work properly (for instance, experiencing extensive Access Violations without apparent cause).

• Problems with seeing GUID and DIID exports from your _TLB.cpp? Change the .h entries for the declarations to be prefixed with extern __declspec (package) const