The documentation for Delphi’s VCL is available on Embarcadero’s DocWiki. You will notice that on DocWiki, all the VCL components are prefixed with a T. This is a convention of the Delphi language, but DelphiVCL module removes the T prefix for a more Python-like experience (see and compare it with the outputs of Section 4).
Here are the lists of all the methods, events, and properties of the form that makes up the example in Section 5:
Check out DelphiVCL which easily allows you to build GUIs for Windows using Python.
Watch this comprehensive introduction to Python GUI Development with DelphiVCL library video by Jim McKeeth: