(VB 2005) Read from txt

[Dreadful]

I've got multiple Text Boxes and when I click a Button the TextBoxes.Text writes inside of a .txt file.
It works fine, exactly how I want it to look:

FileOpen(1, "C:\Blah\Blah\Blah\Test01.txt", OpenMode.Output)
PrintLine(1, TextBox1.Text)
PrintLine(1, TextBox2.Text)
PrintLine(1, TextBox3.Text)
FileClose(1)

This is what I see when I open the .txt file (example, not actual values):

1234
567
89

That's good, it's exactly how i want things to look.
Now for I can't figure out...
I want to, let's say, have:
Label4.Text = [1st line of the .txt file]
Label5.Text = [2nd line of the .txt file]
Label6.Text = [3rd line of the .txt file]
But things get screwy when i use:

FileOpen(1, "C:\Blah\Blah\Blah\Test01.txt", OpenMode.Input)
Label4.Text = InputString(1, 4)
Label5.Text = InputString(1, 3)
Label5.Text = InputString(1, 2)
FileClose(1)

It takes into account [Return] as 2 characters long and doesn't display things how I'd like to see them.
Each row will be 1,2,3 or 4 characters long, so using "InputStrin g(1, 4)" for taking the first 4 characters wont always be acurate.

Any chance there's a way to say:
Label4.Text = [Row1, Column1-4]
Label5.Text = [Row2, Column1-4]
Label6.Text = [Row3, Column1-4]
and if theres only 2 characters on the line, only display 2 characters?

[willakawill]

You can read the line of text into another string and use other functions to get what you want such as Left(mystr, 4) or Right(mystr, 3)

[Dreadful]

Alright! I've got the things working how I want it so far! But now another twist. I've got 3 clumps of data I'd like to save to one single file. So I would kind of like to see my .txt file to look like:

Data Set 1
123
456
789

Data Set 2
987
654
321

Data Set 3
147
258
369

The thing is, I will only be saving one 'Data Set' at a time and I don't want to overwrite the existing other 2 data sets. The way I've got mine set up will overwrite the entire document with the 'Data Set' I'm currently trying to save. So when I click [Save Set 2], the .txt file will be completely erased and only save 'Data Set 2'. I'd like to only change '987' '654' '321' when I select Save and leave the rest of the file in tact. I'd appreciate any more help from someone, thank you in advance!