[Resolvido] Desenhando em janela (windows form)

Estou tentando fazer um programa para desenhar com o mouse (dando só um clique) em uma janela windows form usando o visual c++, mas não está funcionando quando clico não desenha...

ARQUIVO Form1.h:

-----------------------------------------------------

#pragma once

#include "elementos.h"
namespace path {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;
	using namespace CLRSketcher;
	enum class ElementType{robo, obstaculo, objetivo};
	/// <summary>
	/// Summary for Form1
	///
	/// WARNING: If you change the name of this class, you will need to change the
	/// 'Resource File Name' property for the managed resource compiler tool
	/// associated with all .resx files this class depends on. Otherwise,
	/// the designers will not be able to interact properly with localized
	/// resources associated with this form.
	/// </summary>
	public ref class Form1 : public System::Windows::Forms::Form
	{
	public:
 Form1(void) : drawing(false)
 {
 InitializeComponent();
 //
 //TODO: Add the constructor code here
 //
 }

	protected:
 /// <summary>
 /// Clean up any resources being used.
 /// </summary>
 ~Form1()
 {
 if (components)
 {
 delete components;
 }
 }
	private: System::Windows::Forms::RadioButton^ radioButton1;
	protected:
	private: System::Windows::Forms::RadioButton^ radioButton2;
	private: System::Windows::Forms::RadioButton^ radioButton3;

	private:
 /// <summary>
 /// Required designer variable.
 /// </summary>
 System::ComponentModel::Container ^components;
 // Current element type
 ElementType elementType;
 // Current drawing color
 //Color color;
 // Records when drawing an element is in progress
 bool drawing;

 // Temporary store for the element being drawn
 Element^ tempRobo;
 Element^ tempObjetivo;
	private: System::Windows::Forms::Button^ button1;

 Element^ tempObstaculo;

#pragma region 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->radioButton1 = (gcnew System::Windows::Forms::RadioButton());
 this->radioButton2 = (gcnew System::Windows::Forms::RadioButton());
 this->radioButton3 = (gcnew System::Windows::Forms::RadioButton());
 this->button1 = (gcnew System::Windows::Forms::Button());
 this->SuspendLayout();
 //
 // radioButton1
 //
 this->radioButton1->AutoSize = true;
 this->radioButton1->Location = System::Drawing::Point(12, 237);
 this->radioButton1->Name = L"radioButton1";
 this->radioButton1->Size = System::Drawing::Size(46, 17);
 this->radioButton1->TabIndex = 0;
 this->radioButton1->TabStop = true;
 this->radioButton1->Text = L"robo";
 this->radioButton1->UseVisualStyleBackColor = true;
 this->radioButton1->CheckedChanged += gcnew System::EventHandler(this, &Form1::radioButton1_CheckedChanged);
 //
 // radioButton2
 //
 this->radioButton2->AutoSize = true;
 this->radioButton2->Location = System::Drawing::Point(64, 237);
 this->radioButton2->Name = L"radioButton2";
 this->radioButton2->Size = System::Drawing::Size(71, 17);
 this->radioButton2->TabIndex = 1;
 this->radioButton2->TabStop = true;
 this->radioButton2->Text = L"obstaculo";
 this->radioButton2->UseVisualStyleBackColor = true;
 this->radioButton2->CheckedChanged += gcnew System::EventHandler(this, &Form1::radioButton2_CheckedChanged);
 //
 // radioButton3
 //
 this->radioButton3->AutoSize = true;
 this->radioButton3->Location = System::Drawing::Point(141, 237);
 this->radioButton3->Name = L"radioButton3";
 this->radioButton3->Size = System::Drawing::Size(62, 17);
 this->radioButton3->TabIndex = 2;
 this->radioButton3->TabStop = true;
 this->radioButton3->Text = L"objetivo";
 this->radioButton3->UseVisualStyleBackColor = true;
 this->radioButton3->CheckedChanged += gcnew System::EventHandler(this, &Form1::radioButton3_CheckedChanged);
 //
 // button1
 //
 this->button1->Location = System::Drawing::Point(210, 237);
 this->button1->Name = L"button1";
 this->button1->Size = System::Drawing::Size(75, 23);
 this->button1->TabIndex = 3;
 this->button1->Text = L"trajetoria";
 this->button1->UseVisualStyleBackColor = true;
 this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click_1);
 //
 // Form1
 //
 this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
 this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
 this->ClientSize = System::Drawing::Size(746, 266);
 this->Controls->Add(this->button1);
 this->Controls->Add(this->radioButton3);
 this->Controls->Add(this->radioButton2);
 this->Controls->Add(this->radioButton1);
 this->Name = L"Form1";
 this->Text = L"trajetoria";
 this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
 this->ResumeLayout(false);
 this->PerformLayout();

 }

#pragma endregion
private: System::Void radioButton1_CheckedChanged(System::Object^ sender, System::EventArgs^ e) {

 elementType = ElementType::robo;
 }

private: System::Void radioButton2_CheckedChanged(System::Object^ sender, System::EventArgs^ e) {

 elementType = ElementType::obstaculo;
 }

private: System::Void radioButton3_CheckedChanged(System::Object^ sender, System::EventArgs^ e) {

 elementType = ElementType::objetivo;
 }

private: System::Void button1_Paint(System::Object^ sender, System::Windows::Forms::PaintEventArgs^ e) {

 Graphics^ g = e->Graphics;
 if(tempRobo)
 tempRobo->Draw(g);
 if(tempObjetivo)
 tempObjetivo->Draw(g);
 if(tempObstaculo)
 tempObstaculo->Draw(g);
 }

private: System::Void button1_MouseDown(System::Object^ sender, System::Windows::Forms::MouseEventArgs^ e) {

 if(e->Button == System::Windows::Forms::MouseButtons::Left) drawing = true;
 if(drawing)
 {
	switch(elementType)
	{
	case ElementType::robo:
 tempRobo = gcnew CLRSketcher::Rectangle(Color::Red, e->Location);
 break;
	case ElementType::obstaculo:
 tempObstaculo = gcnew CLRSketcher::Rectangle(Color::Green, e->Location);
 break;
	case ElementType::objetivo:
 tempObjetivo = gcnew CLRSketcher::Rectangle(Color::Blue, e->Location);
 break;
	}
	Invalidate();
 }
 }

private: System::Void button1_MouseUp(System::Object^ sender, System::Windows::Forms::MouseEventArgs^ e) {

 drawing = false;
 }

private: System::Void Form1_Load(System::Object^ sender, System::EventArgs^ e) {
}
private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {
}
private: System::Void button1_Click_1(System::Object^ sender, System::EventArgs^ e) {
}

};
}

ARQUIVO elementos.h:

---------------------------------------------------------------------

// elementos.h
// Defines element types
#pragma once

using namespace System;
using namespace System::Drawing;

namespace CLRSketcher
{
// The base class for all elements
public ref class Element abstract
{
protected:

	Point position;
	Color color;
	System::Drawing::Rectangle boundRect;
	Pen^ pen;

 public:
	virtual void Draw(Graphics^ g) abstract;
 };

 // The class defining a line element
 public ref class Line : Element
 {
	protected:
 Point end;

	public:
 // Constructor
 Line(Color color, Point start, Point end)
 {
 pen = gcnew Pen(color);
 this->color = color;
 position = start;
 this->end = end;
 boundRect = System::Drawing::Rectangle(Math::Min(position.X, end.X),
 Math::Min(position.Y, end.Y),
 Math::Abs(position.X - end.X), Math::Abs(position.Y - end.Y));

 // Provide for lines that are horizontal or vertical
 if(boundRect.Width < 2) boundRect.Width = 2;
 if(boundRect.Height < 2) boundRect.Height = 2;
 }

 // Function to draw a line
 virtual void Draw(Graphics^ g) override
 {
 g->DrawLine(pen, position, end);
 }
	};

 // The class defining a rectangle element
 public ref class Rectangle : Element
 {
 protected:

 public:
	Rectangle(Color color, Point p1)
	{
 pen = gcnew Pen(color);
 this->color = color;
 position = p1;
 boundRect = System::Drawing::Rectangle(position, Size(20, 20));
	}

 virtual void Draw(Graphics^ g) override
	{
 g->DrawRectangle(pen, position.X-10, position.Y-10, 20, 20);
	}
 };

 // The class defining a circle element
 public ref class Circle : Element
 {
 protected:
	int width;
	int height;

 public:
	Circle(Color color, Point center, Point circum)
	{
 pen = gcnew Pen(color);
 this->color = color;
 int radius = safe_cast<int>(Math::Sqrt(
 (center.X-circum.X)*(center.X-circum.X) +
 (center.Y-circum.Y)*(center.Y-circum.Y)));
 position = Point(center.X - radius, center.Y - radius);
 width = height = 2*radius;
 boundRect = System::Drawing::Rectangle(position, Size(width, height));
 }

	virtual void Draw(Graphics^ g) override
	{
 g->DrawEllipse(pen, position.X, position.Y, width,height);
	}
 };

}