Transfer macro to UDF - vba

Question

I want the macro below transferred to a UDF but I do not know how.
I want a udf where I select the Findstring and return it in the cell where is place the udf.
Can someone help me?
Sub Find_pipe()
Dim Findstring As String
Dim Location As String
Dim Rng As Range
Sub Find_First()
Dim Findstring As String
Dim Rng As Range
Findstring = InputBox("vul naam van leiding in")
If Trim(Findstring) <> "" Then
With Sheets("scenario 1V2").Range("A1:BP150")
Set Rng = .Find(What:=Findstring, _
After:=.Cells(.Cells.Count), _
LookIn:=xlValues, _
LookAt:=xlWhole, _
SearchOrder:=xlByRows, _
SearchDirection:=xlNext, _
MatchCase:=False)
If Not Rng Is Nothing Then
Application.Goto Rng.Offset(1), True
Application.Goto ThisWorkbook.Worksheets("D en L berekening").Range("A1"), True
ThisWorkbook.Worksheets("D en L berekening").Range("U10").Value = Rng.Offset(1).Value
Else
MsgBox "Nothing found"
End If
End With
End If
End Sub

Answer 1

Try this:
Function FindPipe(Findstring As String)
Application.Volatile 'You need this if your UDF needs to update after changes in
' the search range
Dim f As Range
If Trim(Findstring) <> "" Then
With ThisWorkbook.Sheets("scenario 1V2").Range("A1:BP150")
Set f = .Find(What:=Findstring, _
After:=.Cells(.Cells.Count), _
LookIn:=xlValues, _
LookAt:=xlWhole, _
SearchOrder:=xlByRows, _
SearchDirection:=xlNext, _
MatchCase:=False)
End With
If Not f Is Nothing Then
FindPipe = f.Offset(1).Value
Else
FindPipe = "Not found"
End If
Else
FindPipe = ""
End If
End Function
Note the range to be searched is hard-coded in the UDF, so Excel doesn't know to recalculate your UDF if the search range is updated. I added Application.Volatile to take care of that but it may slow your workbook if you have a lot of formulas pointing to that UDF.