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CheckKeypress

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Submitted on: 1/2/2015 2:16:00 AM
By: Martin Idman (from psc cd)  
Level: Not Given
User Rating: By 4 Users
Compatibility: VB 4.0 (32-bit), VB 5.0, VB 6.0
Views: 570
 
     
 
code:
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'**************************************
' Name: CheckKeypress
' Description: 
' By: Martin Idman (from psc cd)
'
' Inputs:KeyAscii from controls keypress-event
cAllowed as a string ("N" for numbers only...)
'
' Returns:KeyAscii for pressed key if ok or nothing and a beep for not ok
'
' Assumes:Put the call in a controls keypress-event
Ex: KeyAscii=CheckKeypress(KeyAscii, "N") 
Will only allow the user to enter digits in a control
'**************************************

Public Function CheckKeyPress(iKeyIn As Integer, cAllowed As String) As Integer
Dim cValidKeys As String
Select Case cAllowed
 Case "N" ' Just numbers
 cValidKeys = "1234567890" & vbCr & vbTab & vbBack
 Case "N1" ' Decimal numbers
 cValidKeys = "1234567890," & vbCr & vbTab & vbBack
 Case "N2" ' Simple math
 cValidKeys = "1234567890+-*/=," & vbCr & vbTab & vbBack
 Case "C" ' Simple characterset(I'm Swedish, hence some strange ones)
 cValidKeys = "ABCDEFGHIJKLMNOPQRSTUVWXYZAAEI- " & vbCr & vbTab & vbBack
 Case "C1" ' Enhanced characterset
 cValidKeys = "ABCDEFGHIJKLMNOPQRSTUVWXYZAAEI&#,.-/\+-*%$<>:;@!?=() " & vbCr & vbTab & vbBack
 Case "C2" ' Enhanced + digits
 cValidKeys = "ABCDEFGHIJKLMNOPQRSTUVWXYZAAEI1234567890&#,.-/\+-*%$<>:;@!?=() " & vbCr & vbTab & vbBack
 Case "M" ' Mail and WWW
 cValidKeys = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890-_/\~:@." & vbCr & vbTab & vbBack
 Case "D" ' Date or telephonenumbers
 cValidKeys = "0123456789-" & vbCr & vbTab & vbBack
End Select
If InStr(cValidKeys, UCase(Chr(iKeyIn))) Then
 CheckKeyPress = iKeyIn
Else
 Beep
 CheckKeyPress = 0
End If
End Function


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