C++ forms - tid

System::Timers::Timer^ t;
System::DateTime jobendingtime;
private: 
System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) 
{
	t = gcnew System::Timers::Timer(1000);
	t->Elapsed += gcnew System::Timers::ElapsedEventHandler(this, &Form1::checkTime);
	jobendingtime = System::DateTime::Now.AddSeconds(10);
	t->Start();

}
void setEnabled(bool enabled)
{
	button1->Enabled = enabled;
}
delegate void setEnabledDelegate(bool enabled);

void checkTime(System::Object^ sender, System::Timers::ElapsedEventArgs^ arg)
{
	if(button1->Enabled && System::DateTime::Now < jobendingtime)
	{
		setEnabledDelegate^ e = gcnew setEnabledDelegate(this, &Form1::setEnabled);
		button1->Invoke(e, false);
	}
	else if(!button1->Enabled && System::DateTime::Now > jobendingtime)
	{
		setEnabledDelegate^ e = gcnew setEnabledDelegate(this, &Form1::setEnabled);
		button1->Invoke(e, true);
	}
}

if(button1->Enabled && System::DateTime::Now < jobendingtime)
	button1->Enabled = false;
else if(!button1->Enabled && System::DateTime::Now > jobendingtime)
	button1->Enabled = true;