function IE_installed(var Version: string): Boolean; var Reg: TRegistry; begin Reg := TRegistry.Create; with Reg do
begin RootKey := HKEY_LOCAL_MACHINE;
OpenKey('Software\Microsoft\Internet Explorer', False); if ValueExists('Version') then Version := ReadString('Version') else Version := '';
CloseKey;
Free; end;
Result := Version <> ''; end;
procedure TForm1.Button1Click(Sender: TObject); var IE_Version: string; begin
if IE_Installed(IE_Version) then ShowMessage(Format('Internet Explorer %s installed.', [IE_Version])); end;