Loop, although all the UDF names in the project

Question

This question: Finding the use of functions in Excel VBA made me think about the process of automating the search for all UDFs used in a spreadsheet. Sort of:

For Each UDF in Module1
    If Cells.Find(What:=UDF.Name, After:="A1", LookIn:=xlFormulas, _
        LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, _
        MatchCase:=False) Then
        MsgBox UDF.Name & " is in use"
    End If
Next UDF

Is this possible, and if so, what syntax should be run for all UDFs?

Answer 1

Option Explicit

' Add reference to Microsoft Visual Basic for Applications Extensibility 5.3 Library

Public Sub FindFunctionUsage()
    Dim udfs
    udfs = ListProcedures("Module1")
    If Not IsArray(udfs) Then _
        Exit Sub

    Dim udf
    Dim findResult

    For Each udf In udfs
        Set findResult = Cells.Find(What:="=" & udf, After:=Cells(1), LookIn:=xlFormulas, _
            LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, _
            MatchCase:=False)

        If Not findResult Is Nothing Then _
            MsgBox udf & " is in use"
    Next udf
End Sub

' Source for ListProcedures : http://www.cpearson.com/excel/vbe.aspx
Private Function ListProcedures(moduleName As String)
        Dim VBProj As VBIDE.VBProject
        Dim VBComp As VBIDE.VBComponent
        Dim CodeMod As VBIDE.CodeModule
        Dim LineNum As Long
        Dim NumLines As Long
        Dim WS As Worksheet
        Dim rng As Range
        Dim ProcName As String
        Dim ProcKind As VBIDE.vbext_ProcKind

        Set VBProj = ActiveWorkbook.VBProject
        Set VBComp = VBProj.VBComponents(moduleName)
        Set CodeMod = VBComp.CodeModule

        Dim result
        With CodeMod
            LineNum = .CountOfDeclarationLines + 1
            Do Until LineNum >= .CountOfLines
                ProcName = .ProcOfLine(LineNum, ProcKind)
                If ProcKindString(ProcKind) = "Sub Or Function" Then
                    If IsArray(result) Then
                        ReDim Preserve result(LBound(result) To UBound(result) + 1)
                    Else
                        ReDim result(0 To 0)
                    End If
                    result(UBound(result)) = ProcName
                End If

                LineNum = .ProcStartLine(ProcName, ProcKind) + _
                        .ProcCountLines(ProcName, ProcKind) + 1
            Loop
        End With
        ListProcedures = result
    End Function

    Function ProcKindString(ProcKind As VBIDE.vbext_ProcKind) As String
        Select Case ProcKind
            Case vbext_pk_Get
                ProcKindString = "Property Get"
            Case vbext_pk_Let
                ProcKindString = "Property Let"
            Case vbext_pk_Set
                ProcKindString = "Property Set"
            Case vbext_pk_Proc
                ProcKindString = "Sub Or Function"
            Case Else
                ProcKindString = "Unknown Type: " & CStr(ProcKind)
        End Select
    End Function

' Content of Module1
Public Sub Sub1()

End Sub

Public Function Func1(ByRef x As Range)

End Function

Public Sub Sub2()

End Sub

Answer 2

Well, I’m going to do this with difficulty because I’m going to assume that you do not want to load VBE classes from my repository to make it a little easier to work, but they are an example of what is possible independently.

Microsoft Visual Basic 5.3 VBA , . (, Office 2010)

• " VBA".

, - , .

• ,
• *.bas- ( UDF).

vba, , . , Run, , . . results. , , , , .

Option Explicit

Private Sub Run()
    Dim results As New Collection

    Dim component As VBIDE.VBComponent
    For Each component In Application.VBE.ActiveVBProject.VBComponents

        If component.Type = vbext_ct_StdModule Then
            ' find public functions with no arguments
            Dim codeMod As CodeModule
            Set codeMod = component.CodeModule

            If InStr(1, codeMod.Lines(1,codeMod.CountOfDeclarationLines), "Option Private Module") = 0 Then

                Dim lineNumber As Long
                lineNumber = codeMod.CountOfDeclarationLines + 1

                Dim procName As String
                Dim procKind As vbext_ProcKind
                Dim signature As String

                ' loop through all lines in the module
                While (lineNumber < codeMod.CountOfLines)
                    procName = codeMod.ProcOfLine(lineNumber, procKind) 'procKind is an OUT param

                    Dim lines() As String
                    Dim procLineCount As Long

                    procLineCount = codeMod.ProcCountLines(procName, procKind)
                    lines = Split(codeMod.lines(lineNumber, procLineCount), vbNewLine)

                    Dim i As Long
                    For i = 0 To UBound(lines)
                        If lines(i) <> vbNullString And Left(Trim(lines(i)), 1) <> "'" Then
                            signature = lines(i)
                            Exit For
                        End If
                    Next

                    ' this would need better parsing, but should be reasonably close
                    If InStr(1, signature, "Public Function", vbTextCompare) > 0 Then 'first make sure we have a public function
                        results.Add signature
                    End If

                    lineNumber = lineNumber + procLineCount + 1 ' skip to next procedure
                Wend

            End If

        End If
    Next component

    Dim str
    For Each str In results
        Debug.Print str
    Next
End Sub

Public Function foo()

End Function

Private Function bar()

End Function

Public Function qwaz(duck)

End Function