CD Remember

Code:

unit cd;

interface

uses

Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,

Buttons, StdCtrls, MMSystem;

type

TForm1 = class(TForm)

   Label1: TLabel;

   Button1: TButton;

   Label2: TLabel;

   Label3: TLabel;

   BitBtn1: TBitBtn;

   BitBtn2: TBitBtn;

   Edit1: TEdit;

   GroupBox1: TGroupBox;

   RadioButton1: TRadioButton;

   RadioButton2: TRadioButton;

   Button2: TButton;

   procedure FormCreate(Sender: TObject);

   procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);

   procedure BitBtn2Click(Sender: TObject);

   procedure BitBtn1Click(Sender: TObject);

   procedure Button1Click(Sender: TObject);

   procedure Button2Click(Sender: TObject);

private

   { Private declarations }

public

   { Public declarations }

end;

var

Form1: TForm1;

implementation

{$R *.DFM}

function FindCD:Integer;

var

i, DType:integer;

str:string;

drive:integer;

begin

Result:=0;

for i:=65 to 90 do

begin

str:=chr(i)+':\';

DType:=GetDrivetype(PChar(str));

case DType of

     0: drive:=0;

     1: drive:=1;

     DRIVE_CDROM : drive:=i;

end;

if not ((DType=0) or (Dtype=1)) then

Result:=drive;

end;

end;

function DiskInDrive(Drive: Char): Boolean;

var

ErrorMode: word;

begin

{ переводим в верхний регистр }

if Drive in ['a'..'z'] then Dec(Drive, $20);

{ убеждаемся, что это буква }

if not (Drive in ['A'..'Z']) then

     raise EConvertError.Create('Not a valid drive ID');

//отключаем критические ошибки//

ErrorMode := SetErrorMode(SEM_FailCriticalErrors);

try

     if DiskSize (Ord(Drive) - $40) = -1 then

       Result := False

     else

       Result := True;

finally

     { восстанавливаем старый режим ошибок }

     SetErrorMode(ErrorMode);

end;

end;

procedure ChooseCloseMode;

begin

Form1.Height:=290;

Form1.Repaint;

end;

procedure TForm1.FormCreate(Sender: TObject);

begin

Edit1.text:=(chr(Findcd)+':\');

Button1.Enabled:=false;

Label1.Enabled:=false;

end;

procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean);

begin

if DiskInDrive(chr(findcd))=true then

begin

Canclose:=false;

Form1.Show;

end

else // если нет

CanClose:=true;

end;

procedure TForm1.BitBtn2Click(Sender: TObject);

begin

ChooseCloseMode;

end;

procedure TForm1.BitBtn1Click(Sender: TObject);

begin

mciSendString('Set cdaudio door open wait', nil, 0, handle);

Button1.Enabled:=true;

Label1.Enabled:=true;

BitBtn1.Enabled:=false;

Bitbtn2.Enabled:=false;

end;

procedure TForm1.Button1Click(Sender: TObject);

begin

mciSendString('Set cdaudio door closed wait', nil, 0, handle);

ChooseCloseMode;

end;

procedure TForm1.Button2Click(Sender: TObject);

begin

if Radiobutton1.Checked=true then

       ExitWindowsEx(EWX_POWEROFF or EWX_SHUTDOWN,0)

else

if Radiobutton2.Checked=true then

       ExitWindowsEx(EWX_REBOOT,0);

end;

end.