Stop Update / Don't Update requestor message

I have some VB code which sequentially opens over 200 workbooks to extract data from each and populate another workbook. These workbooks do have links to other workbooks in them.
For some reason when some of these workbooks are opened I get a requestor window asking whether I want to Update or Don't Update the data. I always want to Update the workbook and believe this can be done in VB by hiding the requestor?
Can anyone help me please.

Regards

Geoff