Assigning Values to System.Array in VB.NET

[Nightfarer]

Hello.

I have a big trouble using System.Array class (it's the first time I use it) for a software I'm developing.

I have a form with a textbox(numbers) and one button (done).
Once the number is added to textbox clicking the done button saves the number in a variable (Numbers).
The next form has a textbox(letter) and two buttons (add new, done).
Values inserted in textbox are the values to be added to Array clicking add new button (the lenght of Array is Numbers variable).
It must do a cycle and when last item of lenght is done (so when Numbers lenght is reached) the add new button must not be visible anymore so to have only done button to proceed.
At each add new click obviously the next letter added should be put in next position in array and textbox must be cleared to add new value.

Numbers is an integer
letter is a string

I create the Array in this way:
LettersArray = Array.CreateInstance(GetType(String),Numbers)

For the cycle I used something like

for i as integer = 0 to Numbers
Array.SetValue(letter, Numbers)
textbox.clear()
If i = Numbers then Exit For
Next i

I continue to receive IndexOutOfRange Exceptions.

Hope someone explain and help me why it doesn't work and solve the issue.

Thanks in advance,
Luca

[Nightfarer]

Hello.

I solved the loop issue and assignement of values to array but I have another one:
the loop doesn't wait the new user input given by textbox and passed to array routine by the click event but add the same letter to all array length.

The form and routine must work this way:
1) User adds value in textbox and the click event of add new button should pass the value to array routine (starting the loop) and clear textbox
2) Routine must wait the user to pass new value via textbox and new add new button click so there must be a WAIT for the loop
3) Step 2 must be repeated for the entire loop (using array length)
4) Once all values are given and assigned (so after finishing loop) add new button must be invisible or inactive and there's the done button to proceed.

How do I solve this?
Please, it's urgent.

Luca