Writing Output Text File

I am new in the Vb Script and would like to ask how to write the
numbers using format.

For example in the macro i have the numbers:

10 20 30
11 21 31

I also write in the macro:
Dim fso, myFile
Set /> Set

Now I want to write in the file the numbers a1 b1 c1 using format
as in Vb 6 ( for example "##.#" )

I trying
myFile.Write ( but don’t now what to write here )

Thank you in advance

Boris