Macro to pull data from another workbook

Hi,

I'm trying to figure out a macro which will help me to pull data from another workbook and past it in A10 (in attached WB). For example, in combo box if i select Master WB 1 then the macro should copy the information from sheet 1 in Master WB 1 and paste it in current WB (attached WB) in A10. Similarly if i select Master WB 2 from the combo box then the macro should copy the information from sheet 1 in Master WB 2 and paste it in current WB in A10 (not beneath as i don't want to see the data of Master WB 1 when i select Master WB 2 or other).