If you use Delphi, go to "Project/Import Type Library...", choose "abcAVI Info Library (Version 2.0)" and then "Install...". Confirm all the dialogs and the new component "ExtendedAVITags" will appear on the components pallete (ActiveX tab). Delphi automatically generates abcAVI_TLB.pas in it's Imports directory with the description of the library interface.