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Delphi source code for Miscellaneous >> Check if a disk is in the drive


Category: Miscellaneous
Title: Check if a disk is in the drive
Date added: 15.03.2006
Hits: 9122



function DiskInDrive(Drive: Char): Boolean;
var
  ErrorMode: Word;
begin
  { make it upper case }
  if Drive in ['a'..'z'] then Dec(Drive, $20);
  { make sure it's a letter }
  if not (Drive in ['A'..'Z']) then
    raise EConvertError.Create('Not a valid drive ID');
  { turn off critical errors }
  ErrorMode := SetErrorMode(SEM_FailCriticalErrors);
  try
    { drive 1 = a, 2 = b, 3 = c, etc. }
    if DiskSize(Ord(Drive) - $40) = -1 then
      Result := False
    else
      Result := True;
  finally
    { Restore old error mode }
    SetErrorMode(ErrorMode);
  end;
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
  if DiskInDrive('a') = False then
    ShowMessage('Drive not ready');
end;

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