(Visual Basic 2008 Express edition)
I have string1 that may contain from 6 to 180 integers and comma characters, something like this:

11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,
The number of integers is always divisible by the number 3.
I need to make a new string2, containing every third integer from string1 but starting from the pre-specified integer (in TextBox1), at a special procedure, as follows:
If TextBox1.Text = 1 then string2 (for the example above) should look like this:

String1 = 11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,

String2= 11,14,17,20,23


But, If the TextBox1.Text = 8 then string2 (for the example above) should look like this:

String1=11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,

String2= 18,21,24,12,15,

Whether this can be done?
I hope to get a help.
Thanks in advance.

Onenew