Не работает trackbar

    private: System::Void trackBar1_Scroll(System::Object^ sender, System::EventArgs^ e) {
        int volume = trackBar1->Value;
        axWindowsMediaPlayer1->settings->volume = volume;
    }

            // 
            // trackBar1
            // 
            this->trackBar1->AllowDrop = true;
            this->trackBar1->AutoSize = false;
            this->trackBar1->Location = System::Drawing::Point(47, 340);
            this->trackBar1->Margin = System::Windows::Forms::Padding(3, 2, 3, 2);
            this->trackBar1->Maximum = 100;
            this->trackBar1->Name = L"trackBar1";
            this->trackBar1->RightToLeft = System::Windows::Forms::RightToLeft::Yes;
            this->trackBar1->Size = System::Drawing::Size(223, 47);
            this->trackBar1->TabIndex = 17;
            this->trackBar1->TickFrequency = 10;
            this->trackBar1->TickStyle = System::Windows::Forms::TickStyle::Both;
            this->trackBar1->Value = 50;
            this->trackBar1->Scroll += gcnew System::EventHandler(this, &MyForm::trackBar1_Scroll);
            this->trackBar1->ValueChanged += gcnew System::EventHandler(this, &MyForm::trackBar1_Scroll);

System::Diagnostics::Debug::Print(volume.ToString());