regEx not parsing correctly

I would try:
"\[QUOTE=([^\]]+)\]([^\[]+)\[\/QUOTE\]"

Use nongreedy operator ? and [^\[] instead of [^\]] in the second bracket

\[QUOTE=([^\]]+?)\]([^\[+?)\[\/QUOTE\]

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Sorry forgot a bracket

\[QUOTE=([^\]]+?)\]([^\[]+?)\[\/QUOTE\]

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To add ? to the pattern would suggest that the [^\]]+ or [^\[]+ might overmatch or otherwise benefit from having ? added, which I don't see that being the case.

The actual issue with the original pattern was that the second ([^\]]+) needed to be ([^\[]+)

Here's the working code with my pattern:

Imports System.Text.RegularExpressions
Module Module1
    Sub Main()
        Console.WriteLine(BBtoHTML("[QUOTE=SomeDude]Some example text goes here[/QUOTE]"))
    End Sub
    Public Function BBtoHTML(ByVal BBCode As String) As String
        Dim regExp As System.Text.RegularExpressions.Regex
        regExp = New Regex("\[QUOTE=([^\]]+)\]([^\[]+)\[\/QUOTE\]")
        Return regExp.Replace(BBCode, "<blockquote style=""background-color: #CCCCCC; border-width: thin"">Originally Posted by <strong>$1</strong><br /><em>$2</em></blockquote>")
    End Function
End Module

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Sorry, I was sent out of town for some work.  I'll try these suggestions and get back as soon as I can.

Thanks for all the help guys!

I tried the example and it does work, but only if another quote isn't embedded within a quote. Does that make sense?

I've attached my test BBCode and my basic function for the conversion. There are still a few things in the BBCode that I haven't written any code for, but I'm still including it just in case.  Like I said earlier, I found some of this code on the web and have been trying to add to it.  Also is there anyway to use the regex without regard for case?

Heres my test BBCode (kept in an access database, all one string):

[B]The[/B] [FONT="Comic Sans MS"][SIZE="1"]quick[/SIZE][/FONT] [U]brown[/U] [I]fox [COLOR="Red"]jumped[/COLOR] [COLOR="DarkOrchid"]over[/COLOR] the lazy dogs back![/i]
[QUOTE=SomeDude]This is a quote![QUOTE=AnotherDude]This is a quote within a quote[QUOTE=ThirdDude]This is a quote within a quote within a quote[/QUOTE][/QUOTE][/QUOTE]

[IMG]http://upload.wikimedia.org/wikipedia/en/thumb/2/24/Lenna.png/200px-Lenna.png[/IMG]

[URL="http://www.microsoft.com"]Test Link[/URL]

[LIST=1]
[*]Item 1
[*]Item 2
[*]Item 3
[/LIST]

[LIST]
[*]Item 1
[*]Item 2
[*]Item 3
[/LIST]

[INDENT]Indented text[/INDENT]
Thanks!

Public Function ConvertBBCodeToHTML(ByVal BBCode As String) As String
        Dim regExp As Regex
        Dim Ret As String = BBCode
 
        '//Regex for URL tag without anchor
        regExp = New Regex("\[URL\]([^\]]+)\[\/URL\]")
        Ret = regExp.Replace(Ret, "<a href=""$1"">$1</a>")
 
        '//Regex for URL with anchor
        regExp = New Regex("\[URL=([^\]]+)\]([^\]]+)\[\/URL\]")
        Ret = regExp.Replace(Ret, "<a href=""$1"">$2</a>")
 
        '//Image regex
        regExp = New Regex("\[IMG\]([^\]]+)\[\/IMG\]")
        Ret = regExp.Replace(Ret, "<img src=""$1"" />")
 
        '//Bold text
        regExp = New Regex("\[B\](.+?)\[\/B\]")
        Ret = regExp.Replace(Ret, "<b>$1</b>")
 
        '//Italic text
        regExp = New Regex("\[I\](.+?)\[\/I\]")
        Ret = regExp.Replace(Ret, "<i>$1</i>")
 
        '//Underline text
        regExp = New Regex("\[U\](.+?)\[\/U\]")
        Ret = regExp.Replace(Ret, "<u>$1</u>")
 
        '//Font size
        regExp = New Regex("\[SIZE=([^\]]+)\]([^\]]+)\[\/SIZE\]")
        Ret = regExp.Replace(Ret, "<font size=$1>$2</font>")
 
        '//Font name
        regExp = New Regex("\[FONT=([^\]]+)\]([^\]]+)\[\/FONT\]")
        Ret = regExp.Replace(Ret, "<font face=$1>$2</font>")
 
        '//Font color
        regExp = New Regex("\[COLOR=([^\]]+)\]([^\]]+)\[\/COLOR\]")
        Ret = regExp.Replace(Ret, "<font color=$1>$2</font>")
 
        '//Quote
        regExp = New Regex("\[QUOTE=([^\]]+)\]([^\[]+)\[\/QUOTE\]")
        Ret = regExp.Replace(Ret, "<blockquote style=""background-color: #E4E4E4; border-width: thin"">"Originally Posted by <strong>$1</strong><br /><em>$2</em></blockquote>")
 
        Ret = Ret.Replace(vbNewLine, "<br />")
        Return Ret
    End Function

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I couldn't quite figure out how to get the MatchEvaluator to work in my situation, but I'm obviously not the greatest coder anyway.  :)

This may not the right way to do it, but it definately works!  Now I just have to fix a few font issues and such and the "Quote" looks like it's good to go!

Oh, Btw, I found the RegexOptions.IgnoreCase option and that helped tremendously!

Thanks again!

regExp = New Regex("\[QUOTE=([^\]]+)\]([^\[]+)\[\/QUOTE\]", RegexOptions.Multiline Or RegexOptions.IgnoreCase)
 
Do While regExp.IsMatch(Ret) = True
        Ret = regExp.Replace(Ret, "<blockquote style=""background-color: #E4E4E4; border-width: thin"">"Originally Posted by <strong>$1</strong><br /><em>$2</em></blockquote>")
Loop

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Thanks for the question and the points.