unit1.pas

《Delphi 7应用编程150例》源码（全）

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, StdCtrls, FileCtrl, ShellApi;

type
  TForm1 = class(TForm)
    DriveComboBox1: TDriveComboBox;
    procedure DriveComboBox1Change(Sender: TObject);
    procedure FormPaint(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.DriveComboBox1Change(Sender: TObject);
begin
    self.Refresh;
end;

procedure TForm1.FormPaint(Sender: TObject);
var
    FileInfo:TSHFileInfo;
begin
    SHGetFileInfo(PChar(self.DriveComboBox1.Drive+':\'),0,FileInfo,SizeOf(FileInfo),
                  SHGFI_ICON or SHGFI_LARGEICON);
    DrawIcon(Canvas.Handle,20,20,FileInfo.hIcon);
end;

end.