Use the Add property to add a new FileTypes object to the collection, and to specify the group's pattern. The Pattern property specifies a string expression that may include wild cards like * and ?, and defines the files whose name matches the pattern, if the HasPattern property is True. The control uses the Name property to check the pattern. For instance, the *.BMP defines all files that has the extension BMP. The Apply method applies the changes to the current list.  Use the BrowseFolderPath property to specify the path to the browsed folder.