MsgBox - Make unclickable OK Button and change to countdown - Inno Setup - inno-setup

Question

How to change OK button into a countdown timer like this...
5,4,3,2,1,0 [MsgBox Closes automatically] don't display 0
Proceeds to setup procedure.
The button should not be clickable and faded. Like inactive window/button/box.
this one:
not this one:
I use the code code from this question: How to show a message box for a specified time?

Answer 1

There's no built-in function with such functionality. Neither in Inno Setup, nor WinAPI.
You have to implement the dialog on your own and use a timer to implement the count down.
[Code]
function SetTimer(hWnd: LongWord; nIDEvent, uElapse: LongWord;
lpTimerFunc: LongWord): LongWord; external 'SetTimer#user32.dll stdcall';
function KillTimer(hWnd: HWND; uIDEvent: LongWord): BOOL;
external 'KillTimer#user32.dll stdcall';
var
CountdownButton: TNewButton;
Countdown: Integer;
procedure UpdateCountDownButtonCaption;
begin
CountdownButton.Caption := Format('%d sec', [Countdown]);
end;
procedure CountdownProc(
H: LongWord; Msg: LongWord; IdEvent: LongWord; Time: LongWord);
begin
Dec(Countdown);
if Countdown = 0 then
begin
CountdownButton.Enabled := True;
TForm(CountdownButton.Parent).Close;
end
else
begin
UpdateCountDownButtonCaption;
end;
end;
procedure CountdownMessageBoxCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
{ Prevent the dialog from being close by the X button and Alt-F4 }
CanClose := CountdownButton.Enabled;
end;
procedure CountdownMessageBox(Message: string; Seconds: Integer);
var
Form: TSetupForm;
MessageLabel: TLabel;
Timer: LongWord;
begin
Form := CreateCustomForm;
try
Form.ClientWidth := ScaleX(256);
Form.ClientHeight := ScaleY(96);
Form.Caption := 'Information';
Form.Position := poMainFormCenter;
Form.OnCloseQuery := #CountdownMessageBoxCloseQuery;
MessageLabel := TLabel.Create(Form);
MessageLabel.Top := ScaleY(16);
MessageLabel.Left := ScaleX(16);
MessageLabel.AutoSize := True;
MessageLabel.Caption := Message;
MessageLabel.Parent := Form;
if CountdownButton <> nil then
RaiseException('Countdown in progress already');
Countdown := Seconds;
CountdownButton := TNewButton.Create(Form);
CountdownButton.Parent := Form;
CountdownButton.Width := ScaleX(88);
CountdownButton.Height := ScaleY(26);
CountdownButton.Left :=
Form.ClientWidth - CountdownButton.Width - ScaleX(18);
CountdownButton.Top :=
Form.ClientHeight - CountdownButton.Height - ScaleX(11);
UpdateCountDownButtonCaption;
CountdownButton.Name := 'CountdownButton';
CountdownButton.ModalResult := mrOk;
CountdownButton.Default := True;
CountdownButton.Enabled := False;
Timer := SetTimer(0, 0, 1000, CreateCallback(#CountdownProc));
try
Form.ShowModal();
finally
KillTimer(0, Timer);
end;
finally
Form.Free();
CountdownButton := nil;
end;
end;
For CreateCallback function, you need Inno Setup 6. If you are stuck with Inno Setup 5, you can use WrapCallback function from InnoTools InnoCallback library.
Use it like:
CountdownMessageBox('Message here', 10);
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