Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Back in the form unit, uCardPanel.pas, it starts with the unit keyword and has both an interface and implementation section, each with a uses clause."

A block of code is set as follows:

procedure TfrmPeopleList.lbPeopleClick(Sender: TObject);
var
  APerson: TPerson;
begin
  if lbPeople.ItemIndex > -1 then begin
    APerson := lbPeople.Items.Objects[lbPeople.ItemIndex] 
                  as TPerson;
    lblPersonName.Caption := APerson.FirstName + ' ' + 
                             APerson.LastName;
    lblPersonDOB.Caption  := FormatDateTime('yyyy-mm-dd',
                                 APerson.DateOfBirth);
  end;
end;

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

constructor TfrmPeopleList.TPerson.Create(
                       NewFN, NewLN string; NewDOB: TDate);
begin
  FFirstName := NewFN;
  FLastName  := NewLN;
  FDateOfBirth := NewDOB;
end;

Bold: Indicates a new term, an important word, or words that you see on screen. For instance, words in menus or dialog boxes appear in bold. Here is an example:

"Under the Develop section of Delphi's default Welcome page, click the Open a sample project… link and drill down through the Object Pascal, VCL, and CardPanel folders, and then open the CardPanel project."

Tips or important notes

Appear like this.