INTELLIGENT WORK FORUMS
FOR COMPUTER PROFESSIONALS

Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Visual Basic (Microsoft) Versions 5/6 FAQ

String Manipulation

Characters Validation (works with any combination) by Malchik
Posted: 2 Apr 02

Const sValidLetter As String = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
Const sValidNumeric As String = "0123456789"
Const sValidFrench As String = "TOFaTG(÷v·t"

Public Enum eCaseCheck
    eUPPER = 0
    eLOWER = 1
    eBOTH = 2
End Enum

Private Sub Text1_KeyPress(KeyAscii As Integer)
    'Check with space, letters and french accents no case sensitivity
    If Not isValidChar(KeyAscii, Chr(32) + sValidLetter + sValidFrench, eBOTH) Then KeyAscii = 0
End Sub

Public Function isValidChar(KeyAscii As Integer, sValidKey As String, iCheck As eCaseCheck) As Boolean
  
  'Backspace or Enter
  If KeyAscii = 8 Or KeyAscii = 13 Then
    isValidChar = True
    Exit Function
  End If
  
  If iCheck = eLOWER Then
    isValidChar = InStr(1, LCase(sValidKey), Chr(KeyAscii)) > 0
  ElseIf iCheck = eUPPER Then
    isValidChar = InStr(1, UCase(sValidKey), Chr(KeyAscii)) > 0
  Else
    isValidChar = InStr(1, UCase(sValidKey), UCase(Chr(KeyAscii))) > 0
  End If
  
End Function

Back to Visual Basic (Microsoft) Versions 5/6 FAQ Index
Back to Visual Basic (Microsoft) Versions 5/6 Forum

My Archive

Resources

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close