error LNK1561: entry point must be defined.

This is Visual Express 2013 btw. I'm learning how to make application but i can't figure out how to fix this error.

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#pragma once

namespace Waha {
	
	

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	

	/// <summary>
	/// Summary for MyForm
	/// </summary>
	public ref class MyForm : public System::Windows::Forms::Form
	{
	public:
		MyForm(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
		}

	protected:
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		~MyForm()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::Button^  button1;
	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->button1 = (gcnew System::Windows::Forms::Button());
			this->SuspendLayout();
			// 
			// button1
			// 
			this->button1->Location = System::Drawing::Point(36, 12);
			this->button1->Name = L"button1";
			this->button1->Size = System::Drawing::Size(171, 77);
			this->button1->TabIndex = 0;
			this->button1->Text = L"button1";
			this->button1->UseVisualStyleBackColor = true;
			this->button1->Click += gcnew System::EventHandler(this, &MyForm::button1_Click);
			// 
			// MyForm
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(284, 261);
			this->Controls->Add(this->button1);
			this->Name = L"MyForm";
			this->Text = L"MyForm";
			this->Load += gcnew System::EventHandler(this, &MyForm::MyForm_Load);
			this->ResumeLayout(false);

		}
#pragma endregion
	private: System::Void MyForm_Load(System::Object^  sender, System::EventArgs^  e) {
			 }
	private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {


				 button1->Text = "Hello";
			 }
	};
}
Please post the full text of the error message.
Error 1 error LNK1561: entry point must be defined c:\Users\Margart\documents\visual studio 2013\Projects\Project1\Project1\LINK Project1

http://i.imgur.com/0aaXUYN.jpg

http://i.imgur.com/3IIl4p8.jpg
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