Easily extract text between two strings with this VBA Function. This user-defined function (UDF) can extract a substring between two characters, delimiters, words and more. The delimiters can be the same delimiter or unique strings. I call this UDF SuperMid because it behaves like the VBA Mid Function on steroids.
First, I’ll show you the function. Then, I’ll give you a couple examples of how it can be used to do some really awesome string manipulations.
To begin using it, all you have to do is copy and paste the function into your VBA editor and follow my examples! A description and how-to guide is included as comments in the VBA function so you can read them directly from your VBA editor.
Extract Text Between Two Strings with VBA
Public Function SuperMid(ByVal strMain As String, str1 As String, str2 As String, Optional reverse As Boolean) As String 'DESCRIPTION: Extract the portion of a string between the two substrings defined in str1 and str2. 'DEVELOPER: Ryan Wells (wellsr.com) 'HOW TO USE: - Pass the argument your main string and the 2 strings you want to find in the main string. ' - This function will extract the values between the end of your first string and the beginning ' of your next string. ' - If the optional boolean "reverse" is true, an InStrRev search will occur to find the last ' instance of the substrings in your main string. Dim i As Integer, j As Integer, temp As Variant On Error GoTo errhandler: If reverse = True Then i = InStrRev(strMain, str1) j = InStrRev(strMain, str2) If Abs(j - i) < Len(str1) Then j = InStrRev(strMain, str2, i) If i = j Then 'try to search 2nd half of string for unique match j = InStrRev(strMain, str2, i - 1) End If Else i = InStr(1, strMain, str1) j = InStr(1, strMain, str2) If Abs(j - i) < Len(str1) Then j = InStr(i + Len(str1), strMain, str2) If i = j Then 'try to search 2nd half of string for unique match j = InStr(i + 1, strMain, str2) End If End If If i = 0 And j = 0 Then GoTo errhandler: If j = 0 Then j = Len(strMain) + Len(str2) 'just to make it arbitrarily large If i = 0 Then i = Len(strMain) + Len(str1) 'just to make it arbitrarily large If i > j And j <> 0 Then 'swap order temp = j j = i i = temp temp = str2 str2 = str1 str1 = temp End If i = i + Len(str1) SuperMid = Mid(strMain, i, j - i) Exit Function errhandler: MsgBox "Error extracting strings. Check your input" & vbNewLine & vbNewLine & "Aborting", , "Strings not found" End End Function
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How to use the SuperMid Function
I’m going to provide several examples of how to use the SuperMid function to take all kinds of cool actions. Each example macro will have a comment at the bottom showing what the output will be. Note, you can also use the function as a formula directly in your spreadsheet! Just enter something like
=SuperMid(A9,"abc","xyz") into a cell in Excel.
Extract the string between two words
Sub ExtractSubstring() str1 = "USER: myusername ADDRESS: unknown" str2 = SuperMid(str1, "USER:", "ADDRESS:") 'Result: myusername End Sub
Although I passed the function “USER:” first and “ADDRESS:” second, the function is smart enough to switch the order if it has to find your target words.
Extract the characters between two delimiters
Sub ExtractSubstring2() str1 = "abc-123-xyz-000" str2 = SuperMid(str1, "-", "-") 'Result: 123 End Sub
This macro will pull the words between the first two dashes.
Extract between the last occurrence of two substrings
Sub ExtractSubstring3() str1 = "abc-123-xyz-000" str2 = SuperMid(str1, "-", "-", True) 'Result: xyz End Sub
This macro will pull the string between the last two dashes. To search the string backward, all you have to do is add the optional 4th argument with a value of True.
Extract all the text after a keyword
Sub ExtractSubstring4() str1 = "How now brown cow" str2 = SuperMid(str1, "now", "anyrandomstring") 'Result: brown cow End Sub
Because the function can’t find the second string you pass it, it returns everything after your first string.
Extract a file name from path with VBA
Sub ExtractFileName() str1 = "C:\Users\Ryan\Documents\readme.txt" str2 = SuperMid(str1, "\", ".txt", True) 'Result: readme End Sub
This is just a neat bonus sample to show you how to extract a file name from a path without the extension. If you want to keep the extension, just make the 2nd delimiter string equal to a random set of characters not present in your path.
SuperMid is one of my most powerful string manipulation functions. I use it all the time! I mostly use it to extract file names and to play with fixed-width data. When you’re ready for more awesome string manipulation functions, check out my article on replacing the Nth occurrence of a substring in a string.
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