private: System::Void panel4_DoubleClick(System::Object^ sender, System::EventArgs^ e) {
        backgroundWorker1->RunWorkerAsync(code_data);
 
    }

private: System::Void backgroundWorker1_DoWork(System::Object^ sender, System::ComponentModel::DoWorkEventArgs^ e) {
 
 
    CodeData* user_data = static_cast<CodeDataWrapper^>(e->Argument)->Get();  // e arg = user_data_wrapper
    Readcode(user_data);
 
    backgroundWorker1->ReportProgress(10); //reporting progress :
}
private: System::Void backgroundWorker1_ProgressChanged(System::Object^ sender, System::ComponentModel::ProgressChangedEventArgs^ e) {
 
}
private: System::Void backgroundWorker1_RunWorkerCompleted(System::Object^ sender, System::ComponentModel::RunWorkerCompletedEventArgs^ e) {
    if (e->Cancelled)    //Messages for the events
    {
        MessageBox::Show("You have cancelled background worker!!!");
    }
    else
    {
        MessageBox::Show("Work completed!!");
    }
}