TCustomVirtualStringTree.DefineProperties Method

Helper method to customize loading and saving persistent tree data.

procedure DefineProperties(Filer: TFiler); override;

There were heavy changes in some properties during development of VT. This method helps to make migration easier by reading old properties manually and put them into the new properties as appropriate. These old properties are never written again and silently disappear. 

Another task of this method is to work around the problem that TCollection is not streamed correctly when using Visual Form Inheritance (VFI).

TCustomVirtualStringTree Class