Text to speech -voice change

Code:

#pragma once
 
 
namespace Trololo {
 
        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 System::Speech::Synthesis;
 
        /// <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:
                void SelectVoice(
        String^ name
)
                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::TextBox^  textBox1;
        protected:
        private: System::Windows::Forms::Label^  label1;
        private: System::Windows::Forms::Button^  button1;
        private: System::Windows::Forms::Button^  button2;
 
        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->label1 = (gcnew System::Windows::Forms::Label());
                        this->button1 = (gcnew System::Windows::Forms::Button());
                        this->button2 = (gcnew System::Windows::Forms::Button());
                        this->SuspendLayout();
                        //
                        // textBox1
                        //
                        this->textBox1->BackColor = System::Drawing::SystemColors::InactiveBorder;
                        this->textBox1->Location = System::Drawing::Point(15, 39);
                        this->textBox1->Name = L"textBox1";
                        this->textBox1->Size = System::Drawing::Size(219, 20);
                        this->textBox1->TabIndex = 0;
                        //
                        // label1
                        //
                        this->label1->AutoSize = true;
                        this->label1->Font = (gcnew System::Drawing::Font(L"Verdana", 8.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
                                static_cast<System::Byte>(238)));
                        this->label1->Location = System::Drawing::Point(9, 9);
                        this->label1->Name = L"label1";
                        this->label1->Size = System::Drawing::Size(122, 13);
                        this->label1->TabIndex = 1;
                        this->label1->Text = L"Co mam powiedzieć";
                        this->label1->Click += gcnew System::EventHandler(this, &Form1::label1_Click);
                        //
                        // button1
                        //
                        this->button1->Font = (gcnew System::Drawing::Font(L"Tahoma", 8.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
                                static_cast<System::Byte>(0)));
                        this->button1->Location = System::Drawing::Point(12, 75);
                        this->button1->Name = L"button1";
                        this->button1->Size = System::Drawing::Size(106, 26);
                        this->button1->TabIndex = 2;
                        this->button1->Text = L"Mów";
                        this->button1->UseVisualStyleBackColor = true;
                        this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
                        //
                        // button2
                        //
                        this->button2->Font = (gcnew System::Drawing::Font(L"Tahoma", 8.25F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,
                                static_cast<System::Byte>(238)));
                        this->button2->Location = System::Drawing::Point(128, 75);
                        this->button2->Name = L"button2";
                        this->button2->Size = System::Drawing::Size(106, 26);
                        this->button2->TabIndex = 3;
                        this->button2->Text = L"Wyjdź";
                        this->button2->UseVisualStyleBackColor = true;
                        this->button2->Click += gcnew System::EventHandler(this, &Form1::button2_Click);
                        //
                        // Form1
                        //
                        this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
                        this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
                        this->BackColor = System::Drawing::SystemColors::ActiveCaption;
                        this->BackgroundImageLayout = System::Windows::Forms::ImageLayout::None;
                        this->ClientSize = System::Drawing::Size(246, 116);
                        this->Controls->Add(this->button2);
                        this->Controls->Add(this->button1);
                        this->Controls->Add(this->label1);
                        this->Controls->Add(this->textBox1);
                        this->FormBorderStyle = System::Windows::Forms::FormBorderStyle::Fixed3D;
                        this->MaximizeBox = false;
                        this->Name = L"Form1";
                        this->Text = L"Gaduła";
                        this->Load += gcnew System::EventHandler(this, &Form1::Form1_Load);
                        this->ResumeLayout(false);
                        this->PerformLayout();
 
                }
#pragma endregion
        private: System::Void label1_Click(System::Object^  sender, System::EventArgs^  e) {
       
 
                       
                         }
        private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) {
                        GetInstalledVoices();                  
                         }
private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
 
        try
                {
                        SpeechSynthesizer^synth=gcnew SpeechSynthesizer();
                        synth->Speak(textBox1->Text);
                }
                catch (Exception^ex)
                {
                        SpeechSynthesizer^synth=gcnew SpeechSynthesizer();
                        synth->Speak("Error");
                }
                 }
private: System::Void Form1_Load(System::Object^  sender, System::EventArgs^  e) {
                 }
};
}

That's my code mostly generated by Visual. I don't know how to use :

public:
void SelectVoice(
String^ name
)
I found that here: msdn.microsoft
I want my program to use "IVONA 2 Jacek" voice but i don't know how to use this. I'm just newbie sorry : /