1   
2   unit Unit1;
3   
4   interface
5   
6   uses
7     Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
8     Dialogs, StdCtrls;
9   
10  type
11    TForm1 = class(TForm)
12      Button1: TButton;
13      procedure Button1Click(Sender: TObject);
14    private
15      { Private declarations }
16    public
17      { Public declarations }
18    end;
19  
20  var
21    Form1: TForm1;
22  
23  implementation
24  
25  {$R *.dfm}
26  
27  
28  function CheckFloppy(driveletter: Char) : string;
29  var
30    mask: string[6];
31    sRec: TSearchRec;
32    oldMode: Cardinal;
33    retcode: Integer;
34  begin
35    oldMode:= SetErrorMode(SEM_FAILCRITICALERRORS);
36    mask:= '?:\*.*';
37    mask[1] := driveletter;
38    {$I-}
39    retcode := FindFirst (mask, faAnyfile, SRec);
40    FindClose(SRec);
41    {$I+}
42    case retcode of
43      0: Result := 'Disk with files found.';
44      -18: Result := 'Empty Disk Found.';
45      -21, -3: Result := 'DOS Error Drive Not Ready';
46  
47    else
48       Result := 'NO Disk in Drive';   { unformatted disk in drive    }
49    end;
50    SetErrorMode(oldMode);
51  end; { DriveState }
52  
53  procedure TForm1.Button1Click(Sender: TObject);
54  begin
55   ShowMessage(CheckFloppy('A'));
56  end;
57  
58  end.