Text box question

[hlieu]

Hi,

My question is: How to tell the different between a character(A-Z)and a number(1-0) that has enter the textbox.

Example: I have text1 which allows ONLY numbers to be enter. If the user enters character, it'll show appropriate message.

Thanks

[JHausmann]

Following function should be called from the keypress event in your text field.

Public Function CheckKeyPress(nASCIIValueofKey As Integer) As Boolean

CheckKeyPress = True

If nASCIIValueofKey < Asc("0") Or nASCIIValueofKey > Asc("9") Or nASCIIValueofKey = 8 Then
      'nothing, we will allow these characters
Else 'the user has pressed some key other than 0-9 or backspace
     nASCIIValueofKey = 0 ' cancel the character
     Beep
     CheckKeyPress = False
End If

End Function

'place this in your keypress event for "textfield"
Dim wasKeygood As Boolean

wasKeygood = CheckKeyPress(KeyAscii)
If Not wasKeygood Then
    KeyAscii = 0
    textfield.SelStart = 0
    textfield.SelLength = Len(textfield)
    Exit Sub
End If