Testing for Numbers in a text file

I have an assignment to input a quadratic equation from a text file.

the file will be set up as follows
1,2,3

however I need to test for letters, spaces , obviously comma's all those are fine but have been unable to stop !,@,#,$.%.^.&.*.(,) coming through as numbers

can anybody point me in the right direction:)

You need to use IsNumeric(anytext), this will return true only if [anytext] is entirly numeric, ie. IsNumeric(!) will return false.

Hope this helps