how open website after installer success

[inatha3]

how open website after installer success ? im using Blackbox Inno Setup Script
edit main script with code :

procedure CurStepChanged(CurStep: TSetupStep);
var
ErrCode: integer;
begin
if (CurStep=ssDone) then
begin
ShellExec('open', 'http://your.app.url/', '', '', SW_SHOW, ewNoWait, ErrCode);
end;
end;

succes open URL after install but my game not instaled .

thanks