It's not easy because the .NET RTL resides in a different process. You can wrap up the DotNet DLL into an ActiveX control and call it or have both your app and the DotNet DLL write to the registry, a file, etc. By the way, you CAN wrap up a Win32 DLL in a DotNet DLL and call it from DotNet.

Camel casing capitalizes the first character of each word except the first word, it can frequently resemble a camel. Used by many languages including Paradox's ObjectPAL and Java.

myAge

theBoxCar

Pascal casing capitalizes the first character of each word (including acronyms over two letters in length).

TheHtmlCode

CAStatePercent

In general terms, native code offers faster potential performance and a smaller footprint but can be more complex to build. Also, native code does not require .Net's runtime -- Common Language Runtime (CLR).

Private visibility means members are invisible outside of the unit. In OO terms, this is how Object Pascal implements friendly classes (visibility to the private members of another class). To implement true private members in Delphi 1-7, put each class in a separate unit (most developers didn't bother).

Strict Private visibility means that private members within a class are visible ONLY within the class declared. In OO terms, this is true private visibility.

Protected visibility means members are invisible outside of the unit. In other words, protected members are visible to the class they are declared in as well as descendant classes and any class declared within the unit.

Strict Protected visibility means that protected members within a class are visible ONLY within the class declared and to descendant classes. In OO terms, this is true protected visibility.

A class which prevents another class from inheriting from it and/or prevents another class from overriding a member. The concept of making sure a class is the last class in a descendant class tree.

Examples - /ASPSuite/KB/CrossRef.asp?LangID=&ToLangID=&CatID=10&SyntaxID=4

For abstract methods, you must specify either regular virtual with the virtual keyword or dynamic virtual with the dynamic keyword. In Delphi for Win32, virtual methods are optimized for speed and dynamic methods are optimized for size. The Delphi help indicates to use virtual for most situations. 

It is true that the compiler could make virtual the default and therefore optional but requiring one or the other is consistent with Object Pascal's strong typing.

Use the Screen variable which is a TScreen. The Screen variable is a TScreen component that represents the screen of the system on which the application runs. By default, applications create a screen component based on information from Windows about the current screen device and assign it to Screen.

For example, put the following code in a button click:

MessageDlg( 'screen width = ' + IntToStr( Screen.Width ) + ',
  screen height = ' + IntToStr( Screen.Height ), 

    mtInformation, [mbOk], 0 );

The simplest way to prevent the circular event firing is to check the form's ActiveControl property. This property indicates which component currently has the focus.

The OnChange event should read as follows:

procedure TForm1.EditChange(Sender: TObject);
begin
if TEdit(Sender).Name <> TEdit(ActiveControl).Name then
   begin
       // do processing
   end;
end;

Use the public methods ForegroundColor and BackgroundColor. For example, in the OnChange event of a ColorGrid component you could do the following:

procedure TForm1.ColorGrid1Change(Sender: TObject); 

begin

   Edit1.Font.Color := ColorGrid1.ForegroundColor;

   Edit1.Color := ColorGrid1.BackgroundColor;

end;

None of the components on the "Samples" page are documented.