Threads are parts of a program that can be executed “simultaniously”. The are assigned running time by the operating system. Usually a Delphi project has just one thread (it is created without you knowing about it). This is the main thread. When it is terminated the whole program quits. Threads are useful if you want [...]
In most Windows programs the most important functions can not only be reached through the menu but also via hotkeys and a toolbar. The hotkeys are very easy. Just set the “shortcut” property of a menu entry to anything you want. To get a toolbar in your form you need to add a ToolBar component [...]
Constants and Varibales are declared the same way as in Turbo Pascal: const MyConstant = 100; MyOtherConst: real = 1.0; var MyVar: integer; MySet: set of byte; Note that (same as in Turbo Pascal) the variables are not initialized. You can however declare local typed constants (which you cannot do in standard Pascal): procedure DoSomething; [...]
Object Pascal is the programming language you use in Delphi. It is mostly similar to Turbo Pascal, but Borland has added some features to it. I will deal with these later. Object Pascal is obviously an object oriented language. For those who don’t know what this is I’ll give a brief summary in the next [...]
function GetHardDiskSerial(const DriveLetter: Char): string; var NotUsed: DWORD; VolumeFlags: DWORD; VolumeInfo: array[0..MAX_PATH] of Char; VolumeSerialNumber: DWORD; begin GetVolumeInformation(PChar(DriveLetter + ‘:\’), nil, SizeOf(VolumeInfo), @VolumeSerialNumber, NotUsed, VolumeFlags, nil, 0); Result := Format(‘Label = %s VolSer = %8.8X’, [VolumeInfo, VolumeSerialNumber]) end; procedure TForm1.Button1Click(Sender: TObject); begin ShowMessage(GetHardDiskSerial(‘c’)); end;
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