VB6 String variable substr

Question

Sub guessLetter(letterGuess As String)
    Dim lengthOfSecretWord As Integer
    lengthOfSecretWord = Len(Secret_word) - 1
    tempWord = ""
    Dim letterPosition As Integer
    For letterPosition = 0 To lengthOfSecretWord
        If Mid(Secret_word, letterPosition, 1) = letterGuess Then
            tempWord = tempWord & letterGuess
        Else
            tempWord = tempWord & Mid(lblTempWord, letterPosition, 1)
        End If
    Next
    lblTempWord = tempWord
End Sub

I have runtime error "5" and the problem in line IF, i'm stuck to declare Secret_word.substr(letterPosition, 1) on vb6, first i try write Secret_word.substr(letterPosition, 1) but it can't then i try to manipulate that then runtime error 5 came

Answer 1

The Mid Function in VB (like most things in VB) is 1-indexed, not 0-indexed.

I'm assuming you're familiar with other languages in which you would loop from 0 to Len(String)-1, but VB thinks you'll find it more intuitive to loop from 1 to Len(String).

Refer to the description and example in the documentation for more details.