使用"SAPFEWSELib“的C# SAP自动化。如何从下拉列表中按下按钮？

using SAPFEWSELib;

GuiApplication sapGuiApp = new GuiApplication();
sapGuiApp.Connect();

GuiConnection connection = sapGuiApp.Children.ElementAt(0) as GuiConnection;
connection.Children.ElementAt(0).Select();
GuiSession session = connection.Children.ElementAt(0) as GuiSession;
session.StartTransaction("T-Code");

GuiFrameWindow frame = session.FindById<GuiFrameWindow>("ID");
GuiComboBox comboBox = frame.FindById<GuiComboBox>("ID");
comboBox.Key = "Option";

GuiButton button = frame.FindById<GuiButton>("ID");
button.Press();