error C2065 System::String^ PROBLEM HELP!!

------ Build started: Project: 7, Configuration: Debug Win32 ------

Compiling...

7.cpp

c:\documents and settings\jonathan baldwin\my documents\mycpp\projec\7\7\Form1.h(146) : error C2065: 'str1' : undeclared identifier

Build log was saved at "file://c:\Documents and Settings\Jonathan Baldwin\My Documents\MyCPP\PROJEC\7\7\Debug\BuildLog.htm"

7 - 1 error(s), 0 warning(s)

========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Here is my source code: (I know it's messy)

#pragma once

#include <iostream>

namespace My7 {

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 std;

/// <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)

{

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::CheckBox^ checkBox1;

private: System::Windows::Forms::TextBox^ str1input;

private: System::Windows::Forms::Button^ button1;

private: System::Windows::Forms::Button^ button2;

protected:

private:

/// <summary>

/// Required designer variable.

/// </summary>

System::ComponentModel::Container ^components;

#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->checkBox1 = (gcnew System::Windows::Forms::CheckBox());

this->str1input = (gcnew System::Windows::Forms::TextBox());

this->button1 = (gcnew System::Windows::Forms::Button());

this->button2 = (gcnew System::Windows::Forms::Button());

this->SuspendLayout();

//

// checkBox1

//

this->checkBox1->AutoSize = true;

this->checkBox1->Location = System::Drawing::Point(32, 14);

this->checkBox1->Margin = System::Windows::Forms::Padding(4, 5, 4, 5);

this->checkBox1->Name = L"checkBox1";

this->checkBox1->Size = System::Drawing::Size(180, 24);

this->checkBox1->TabIndex = 0;

this->checkBox1->Text = L"See if Explorer Exists";

this->checkBox1->UseVisualStyleBackColor = true;

this->checkBox1->Click += gcnew System::EventHandler(this, &Form1::checkBox1_Click);

//

// str1input

//

this->str1input->Location = System::Drawing::Point(32, 104);

this->str1input->Name = L"str1input";

this->str1input->Size = System::Drawing::Size(158, 26);

this->str1input->TabIndex = 1;

this->str1input->WordWrap = false;

//

// button1

//

this->button1->Location = System::Drawing::Point(196, 106);

this->button1->Name = L"button1";

this->button1->Size = System::Drawing::Size(125, 24);

this->button1->TabIndex = 2;

this->button1->Text = L"Submit";

this->button1->UseCompatibleTextRendering = true;

this->button1->UseVisualStyleBackColor = true;

this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);

//

// button2

//

this->button2->Location = System::Drawing::Point(35, 146);

this->button2->Name = L"button2";

this->button2->Size = System::Drawing::Size(154, 24);

this->button2->TabIndex = 3;

this->button2->Text = L"OK";

this->button2->UseVisualStyleBackColor = true;

this->button2->Click += gcnew System::EventHandler(this, &Form1::button2_Click);

//

// Form1

//

this->AutoScaleDimensions = System::Drawing::SizeF(9, 20);

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

this->ClientSize = System::Drawing::Size(438, 409);

this->Controls->Add(this->button2);

this->Controls->Add(this->button1);

this->Controls->Add(this->str1input);

this->Controls->Add(this->checkBox1);

this->Margin = System::Windows::Forms::Padding(4, 5, 4, 5);

this->Name = L"Form1";

this->Text = L"Form1";

this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);

this->ResumeLayout(false);

this->PerformLayout();

}

#pragma endregion

private: System::Void checkBox1_Click(System::Object^ sender, System::EventArgs^ e) {

if(System::IO::File::Exists("C:/Windows/Explorer.EXE"))

{

// command

MessageBox::Show(String::Concat("'C:/windows/explorer.exe'\nExists"));

}

}

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

String^ str1 = "str1default";

;}

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

String^ str1=str1input->Text

;}

private: System::Void button2_Click(System::Object^ sender, System::EventArgs^ e) {

/*line 146-Source of Error*/ MessageBox::Show(String::Concat("You Typed:", str1))