private void ImporterRibbon_Load(object sender, RibbonUIEventArgs e) { this.select = new FolderSelection(); this.select.ribbon = this; this.excelWin = Globals.Program.Application.ActiveWindow; this.import = new HeaderImport(excelWin); this.calc = new CalcImport(this); this.openFile = new System.Windows.Forms.OpenFileDialog(); this.openFile.Filter = "Excel files(*.xls;*.xlsx;*.xlsm)|*.xls;*.xlsx;*.xlsm"; }