plez help!counting letters in string

[deehanie]

i tried this but it says error in ' If MyArray(i) = "a" ', that it was out of array bound. did i missing something?

Function MyLetter()
Dim aCount As Integer = 0
Dim bCount As Integer = 0
Dim cCount As Integer = 0
'letter = window.prompt('Please enter a letter', '');
'length = letter.length;
'var my_array = letter.split("");
Dim MyString = txtLetter.Text.Length
Dim MyArray = "aabbcc"

Dim i As Integer
For i = 0 To MyString - 1 Step i + 1


If MyArray(i) = "a" Then
aCount = aCount + 1
ElseIf MyArray(i) = "b" Then

bCount = bCount + 1

ElseIf MyArray(i) = "c" Then
cCount = cCount + 1

End If
Next
Label1.Text = aCount
End Function

[teknomage1]

should ' For i = 0 To MyString - 1 Step i + 1' be ' For i = 0 To MyArray.length - 1 Step i + 1' ?

[deehanie]

okay, finally i get to do that counting letter.I'm using aschii value in vb.But what if i want to count letter from specific input text file? Is there any way to do it?To read the file is no problem..but to count letter and give result of the letter occurrence? can u help with this?tq~

[rdove]

So are you storing the letter or letters you want to count in a text file or are you wanting to create a count of all the individual letters in the text file?