Lancer un programme et attendre qu'il soit chargé

procedure TForm1.Button1Click(Sender: TObject);
var
StartupInfo: TStartupinfo;
ProcessInfo: TProcessInformation;

begin
FillChar(Startupinfo,Sizeof(TStartupinfo),0);
Startupinfo.cb:=Sizeof(TStartupInfo);
if CreateProcess(nil,'pbrush.exe',nil,nil,false,normal_priority_class,nil,
'c:windows',Startupinfo,ProcessInfo) then
begin
WaitforSingleObject(Processinfo.hProcess, infinite);
CloseHandle(ProcessInfo.hProcess);
ShowMessage('Program closed');
end;
end;