Downloading internal table to excel

Hi, i have to download some data from an internal table to an excel file. all the fields in the internal table are strings, some of them look like a number (for example 32,45 or 123,01). Before downloading the internal table to excel i make a "conversion", as i want these fields to appear like "32.45" i replace ',' with '.', but when i download to excel, the fields appears with ','.... My problem is that I need to combine this excel with a Word document and the format with ',' is wrong........

I'm using function MS_EXCEL_OLE_STANDARD_DAT...

thanks in advance...