vc++ windows form application threading

Hi ,

I need to create a thread which contains an endless loop. During each loop a serialport is read. Here is what I have so far:

static void SafeThread1(System::Object ^obj)
		{
			char* directory;
			bool endloop;
			int ADC_read;
			ofstream myStream ;
			int m=1;
			myStream.open(directory);
			myStream<<"ADC1;ADC2;ADC3;ADC4;ADC5;ADC6;ADC7;ADC8"<<endl;
			 Form1 ^ob = (Form1^) obj;
			while(endloop=false){
					ADC_read = this->serialPort1->ReadByte();
					myStream<<ADC_read<<";";

					m++;
					if(m==7){
						myStream<<endl;
						m=0;
					}
				}
		}
static void ThreadProc1(System::Object ^obj)
     {

        SafeThread1(obj);
    }

I start the thread in:

private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {

// TO DO


Thread^ newThread1 = gcnew Thread(gcnew ParameterizedThreadStart(&ThreadProc1 ));
							newThread1->Start(this);

}

and I stop it using :

private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e){
             endLoop = true;

private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e){ 
			 endLoop = true;}

Apparently, I cannot use "this" in a static member function and if I remove static before the void safethread1 , I get " 'Data_Logger::Form1::SafeThread1' : illegal call of non-static member function" . Can someone help me out?

Thanks in advance