Graphics* graph; doesn't work

I just opened a project in Visual Studio 2005 beta 2(c++) and I want to draw, but I cannot declerate Graphics and Pen.

My code:

#pragmaonce

namespace TicTacToe

{

usingnamespace System;

usingnamespace System::ComponentModel;

usingnamespace System::Collections;

usingnamespace System::Windows::Forms;

usingnamespace System::Data;

usingnamespace System::Drawing;

publicrefclass Form1 :public System::Windows::Forms::Form

{

private:

Graphics* graph;

Pen* pen;

public:

Form1(void)

{

InitializeComponent();

graph=this->CreateGraphics();

pen=gcnew Pen(Color::Black);

graph->DrawLine(pen, 20,20, 100, 200);

}

protected:

///<summary>

/// Clean up any resources being used.

///</summary>

///<param name="disposing">"description of the parameter"</param>

virtualvoid Dispose(Boolean disposing)override

if (disposing && components)

{

delete components;

}

__super::Dispose(disposing);

}

private:

///<summary>

/// Required designer variable.

///</summary>

#pragmaregion Windows Form Designer generated code

///<summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

///</summary>

void InitializeComponent(void)

{

this->components =gcnew System::ComponentModel::Container();

this->Size = System::Drawing::Size(300,300);

this->Text = L"Form1";

this->Padding = System::Windows::Forms::Padding(0);

this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;

}

#pragmaendregion

[6026 byte] By [Markus1982] at [2007-12-16]