Solução do Exemplo1

#pragma once
namespace teste9 {
 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 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 // } private: System::Windows::Forms::Button^ button1; public: System::String ^aux; protected: /// <summary> /// Clean up any resources being used. /// </summary> ~Form1() { if (components) { delete components; } } private: System::Windows::Forms::TextBox^ textBox1; 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->textBox1 = (gcnew System::Windows::Forms::TextBox()); this->button1 = (gcnew System::Windows::Forms::Button()); this->SuspendLayout(); // // textBox1 // this->textBox1->Location = System::Drawing::Point(87, 84); this->textBox1->Name = L"textBox1"; this->textBox1->Size = System::Drawing::Size(347, 20); this->textBox1->TabIndex = 0; this->textBox1->MouseUp += gcnew System::Windows::Forms::MouseEventHandler(this, &Form1::textBox1_MouseUp); // // button1 // this->button1->Location = System::Drawing::Point(308, 233); this->button1->Name = L"button1"; this->button1->Size = System::Drawing::Size(139, 71); this->button1->TabIndex = 1; this->button1->Text = L"Limpar"; this->button1->UseVisualStyleBackColor = true; this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click); // // Form1 // this->AutoScaleDimensions = System::Drawing::SizeF(6, 13); this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font; this->ClientSize = System::Drawing::Size(554, 418); this->Controls->Add(this->button1); this->Controls->Add(this->textBox1); this->Name = L"Form1"; this->Text = L"Form1"; this->ResumeLayout(false); this->PerformLayout(); }

#pragma endregion

private: System::Void textBox1_MouseUp(System::Object^ sender, System::Windows::Forms::MouseEventArgs^ e) {

aux = textBox1->SelectedText; } private: System::Void button1_Click(System::Object^ sender, System::EventArgs^ e) {

                                  if(button1->Text == "Limpar")
                                  {   button1->Text = "Desfazer";
                                      textBox1->Text = "";
                                  }else
                                 {   button1->Text = "Limpar";
                                     textBox1->SelectedText = aux;    }	 

} }; }