By Xavier Pacheco
The Delphi five Developer's advisor is a whole reference exhibiting builders what they should recognize so much approximately Delphi five. The textual content starts with a travel of Delphi five fundamentals, together with advancements seeing that model 1. After looking at object-oriented Pascal programming, together with complicated language positive factors, the authors flip to the strengths of utilizing the visible part Library (VCL) software frameworks. They contain a number of worthwhile sections for company builders, together with a "coding criteria" record. Sections on combining VCL with ActiveX controls around out the fundamental journey. complicated themes contain pix programming, development dynamic link-libraries (DLLs), printing, and multithreading
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Extra resources for Delphi 5 developer's guide
Although a method’s implementation code appears outside of the class declaration, the method is still within the scope of the class because it is declared in the class declaration. When you write code to implement a method that refers to properties, methods, or fields of the class where the method is declared, you don’t need to preface those identifiers with the name of the class. Color := clFuchsia You don’t need to qualify Color with Form1 because the Button1Click method is part of TForm1; identifiers in the method body therefore fall within the scope of the TForm1 instance where the method is called.
TWinControl or TWidgetControl Specifies the base class of all controls that can have keyboard focus. Controls under TWinControl are called windowed controls while those under TWidgetControl are called widgets. The next few sections present a general description of the types of classes that each branch contains. For a complete overview of the VCL and CLX object hierarchies, refer to the VCL Object Hierarchy and CLX Object Hierarchy wall charts included with this product. TObject branch The TObject branch includes all VCL and CLX classes that descend from TObject but not from TPersistent.
This includes drawing routines, standard events, and containership. TControl introduces many visual properties that all controls inherit. These include the Caption, Color, Font, and HelpContext or HelpKeyword. While these properties inherited from TControl, they are only published—and hence appear in the Object Inspector— for controls to which they are applicable. For example, TImage does not publish the Color property, since its color is determined by the graphic it displays. TControl also introduces the Parent property, which specifies another control that visually contains the control.