main.cpp Example File

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  #include "musicplayer.h"

  #include <QApplication>
  #include <QFileInfo>
  #include <QSettings>
  #include <QIcon>
  #include <QDir>

  static void associateFileTypes(const QStringList &fileTypes)
  {
      QString displayName = QGuiApplication::applicationDisplayName();
      QString filePath = QCoreApplication::applicationFilePath();
      QString fileName = QFileInfo(filePath).fileName();

      QSettings settings("HKEY_CURRENT_USER\\Software\\Classes\\Applications\\" + fileName, QSettings::NativeFormat);
      settings.setValue("FriendlyAppName", displayName);

      settings.beginGroup("SupportedTypes");
      foreach (const QString& fileType, fileTypes)
          settings.setValue(fileType, QString());
      settings.endGroup();

      settings.beginGroup("shell");
      settings.beginGroup("open");
      settings.setValue("FriendlyAppName", displayName);
      settings.beginGroup("Command");
      settings.setValue(".", QChar('"') + QDir::toNativeSeparators(filePath) + QString("\" \"%1\""));
  }

  int main(int argc, char *argv[])
  {
      QApplication app(argc, argv);
      app.setApplicationName("MusicPlayer");
      app.setOrganizationName("QtWinExtras");
      app.setOrganizationDomain("qt-project.org");
      app.setApplicationDisplayName("QtWinExtras Music Player");

      associateFileTypes(QStringList(".mp3"));

      MusicPlayer player;
      const QStringList arguments = QCoreApplication::arguments();
      if (arguments.size() > 1)
          player.playFile(arguments.at(1));
      player.resize(300, 60);
      player.show();

      return app.exec();
  }