Наследование: System.Windows.Forms.Form
        void mMenuItem_Click(object sender, EventArgs e)
        {
            PluginForm pluginForm = new PluginForm();
            pluginForm.GlueCommands = GlueCommands;
            pluginForm.RefreshElements();

            pluginForm.ShowDialog(Form1.Self);

        }
        void mMenuItem_Click(object sender, EventArgs e)
        {
            PluginForm pluginForm = new PluginForm();

            pluginForm.GlueCommands = GlueCommands;
            pluginForm.RefreshElements();

            pluginForm.ShowDialog(MainGlueWindow.Self);
        }