Test for valid email address***resolved***

What would be the easiest way to test for valid email address in a text box. I will at least check for '@' and a '.' but what else can i do? What is the best way to test for those characters?

Thanks in advance.

Just use InStr to make sure that they are actually in the string (if they aren't, a 0 will be returned). Then, make sure that the @ is at least the second character, and the period is at least one character after the @ and that there is at least two characters after the dot.

VB Code:

Dim strEmail As String
strEmail = "[email protected]"
 
If InStr(strEmail, "@") Then
    If InStr(strEmail, ".") Then
        MsgBox "Yep, there is a @ and a . "
    Else
        MsgBox "There is a @, but no ."
    End If
Else
    MsgBox "there is no @ so I didn't even se if there was a . in it"
    
End If

Slight modification, checks for the "." after the "@".

VB Code:

Dim strEmail As String
Dim iEmail As Integer
Dim iPeriod As Integer
strEmail = "[email protected]"
 
iEmail = InStr(strEmail, "@")
 
iPeriod = InStr(iEmail, strEmail, ".")
 
If iEmail Then
    If iPeriod And Len(strEmail) - iPeriod >= 2 Then
        MsgBox "Yep, there is a @ and a . "
    Else
        MsgBox "There is a @, but no . in the domain name"
    End If
Else
    MsgBox "there is no @ so I didn't even se if there was a . in it"
End If

Just in case they enter blah.blah@blahcom

Also makes sure there are at least 2 characters after the ".".

Do you have any other requirements for determining a valid email address?

s.

Thanks guys!! Instr was what i was using in the beginning but i thought there may have been some advancements in validation code, maybe i'll write a textbox control and have it test the string based on the code from silva and carp.

Cheers
:D