从一个模块的集合中获取值到userform的combobox中

I have a worksheet with data in column 'EGM'. My code saves values from this column in the collection. If there is only one value in the collection, then variable sSelectedEGM is equal to this value. But if there is more than one values, a user should has possibility to choose only one value (I wanted to do this in the combobox) and save selected item into variable sSelectedEGM.I have a worksheet with data in column 'EGM'. M