enable keycode ascii after pressed once

well basicly i want to know if it is possible to enable
lets say for example i pressed the letter "A" is there a way for me to change that so the next time i press it a msgbox appears with a warning
if u r wondering why i'm asking it's cause i'm making a hangman game and if i press the same letter twice my program doesn't work but it works if i only press it once

i would appreciate the help
thanks

one way is to use the KeyPress event:

Code:

---

Private Sub Text1_KeyPress(KeyAscii As Integer)
Dim i As Integer
   
    If IsNull(Text1.Text) Then Exit Sub
    For i = 0 To (Len(Text1.Text))
        If KeyAscii = Asc(Mid(Text5.Text, i + 1, 1)) Then
            MsgBox "You have entered this letter before!"
            KeyAscii = 0
            Exit Sub
        End If
    Next

End Sub

---

Hi, this code needs VB6 i think because of the dynamic array in it. Its a bit crude because it doesnt use the first element of the array to store anything, but i couldnt be bothered mucking around with it any more.

So, give this a go, it runs on a form with one text box on it (called the default, "text1"):

Code:

---

Option Explicit
'The Array
Dim Thearray() As Integer

Private Sub Form_Load()
'Initialise the array
ReDim Thearray(0)
End Sub

Private Sub Text1_KeyPress(KeyAscii As Integer)

    'Have we pressed it already
    If isInArray(KeyAscii) Then
        MsgBox "You have already pressed that letter"
    End If

End Sub

Private Function isInArray(KeyAscii As Integer) As Boolean

    Dim i As Integer
   
    'Start from 1 - the first element (index 0) is not used
    For i = 1 To UBound(Thearray)
        'If the key pressed is already in the array
        If Thearray(i) = KeyAscii Then
            'Return True
            isInArray = True
            Exit Function
        End If
    Next i
   
    'So not in array, put it in the array
    ReDim Preserve Thearray(UBound(Thearray) + 1)
    Thearray(UBound(Thearray)) = KeyAscii
    'Return False
    isInArray = False

End Function

---

Hope this helps

I was able to put parts of both your codes together but
is it possible for me to put that in a command button?

lets say I press "A" in the text box I want it to check if it was pressed before only when i press on the command button .

I also want to know i have to different programmes that do the same thing one is with text1_press and the other command_keypress.

The text1_press check a soon as i press the letter but i want it to check only when i press the command button .

The command_keypress . the command button has to be selected and instead of the mouse click i have to press the letter i whant and if i write "O" in the text box nothing will happen if i click with the mouse on the command button
but if i press "A" when the command button is selected then i will check for an "A" in the hidden word