Features
OWL applications supports (non-exhaustive list) Single/Multiple Document Interface (SDI/MDI), Doc & View Document Model, Drag&Drop, print and print-preview, GDI encapsulation, Windows Help (Winhelp), mail and messaging (MAPI), Internet (OwlSock/WinSock), OLE 1.0 and OLE 2.0 and other features. The "Borland Windows Custom Controls", an alternative to the standard widget set in Windows 3.1, were available in some versions of OWL, and this support propagated their unique look throughout many applications of the era.
In OWL, all classes start with letter "T" (e.g. TApplication); there are several root classes, the most common is TWindow from which window classes (e.g. TFrameWindow, TDecoratedFrameWindow, TDialog, TInputDialog, TFileOpenDialog, etc.) and controls classes (TEdit, TStatic, TButton, TGlyphButton, TComboBox, etc.) are derived. VCL classes also has the same prefix, but in VCL, all classes are derived from TComponent. Applications made with OWLNext are compatible with DEP/NX feature which defend system against virus/internet attacks. OWLNext supports Unicode, even on the Unicode non-compliant Windows 9x.
Read more about this topic: Object Windows Library
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