Remove Special Characters From Text Or Remove Numbers From Text

[Excel Fox]

 
Enum WhatToRemove
    Text
    Numeric
    SpecialCharacters
End Enum
Function RemoveCharacters(ByVal StringToReplace As String, WhatRemove As WhatToRemove) As String 
    Dim RegEx As Object
    
    Set RegEx = CreateObject("VBScript.RegExp")
    
    With RegEx
        .Global = True
        Select Case WhatRemove
            Case Text
                .Pattern = "[A-Za-z]"
            Case Numeric
                .Pattern = "\d"
            Case SpecialCharacters
                .Pattern = "[\;+\.+\#+\!+\'+\*+\,+\+\^+\&+\*+\@+\(+\)]"
        End Select
    End With
    
    RemoveCharacters= RegEx.Replace(StringToReplace, "")
    
    Set RegEx = Nothing
    

End Function

[Rick Rothstein]

 Function RemoveUnnecessaryCharacters(ByVal StringToReplace As String, WhatRemove As WhatToRemove) As String

The part I highlighted in red is causing a "User-defined type not defined" error when I try to run your code?

Also, do you think you could have given that function an any longer name?

[Excel Fox]

Rick, my bad. Updated the code with the missing Enum Type. And the longer name, yeah, a tad long I must admit

[snb]

@ExcelFox

Thanks for sharing.
I couldn't resist exploring; resulting in:

Enum gt_lost
    Text = 0
    Numeric = 1
    Specialcharacters = 2
End Enum

Function RmChr(ByVal Str_chain As String, y As gt_lost) As String
    With CreateObject("VBScript.RegExp")
        .Global = True
        .Pattern = Array("[A-Za-z]", "\d", "[\~+\!+\@+\#+\$+\%+\^+\&+\*+\(+\)+\'+\-+\=+\{+\}+\[+\]+\:+\""+\++\;+\'+\<+\>+\?+\,+\.+\/]")(y)
        RmChr = .Replace(Str_chain, "")
    End With
End Function

[Rick Rothstein]

@snb and ExcelFox...

And I couldn't help developting a non-RegExp function...

Enum WhatToRemove
  Text = 0
  numeric = 1
  SpecialCharacters = 2
End Enum

Function RemoveCharacters(ByVal StringToReplace As String, WhatRemove As WhatToRemove) As String
  Dim X As Long, Pattern() As String
  Pattern = Split("[A-Za-z] # [#~!@$%^&*()'={}[:""+;<>?,./\-]")
  If WhatRemove = SpecialCharacters Then StringToReplace = Replace(StringToReplace, "]", "")
  For X = 1 To Len(StringToReplace)
    If Mid(StringToReplace, X, 1) Like Pattern(WhatRemove) Then Mid(StringToReplace, X, 1) = Chr(1)
  Next
  RemoveCharacters = Replace(StringToReplace, Chr(1), "")
End Function

Note: I used snb's special characters list as it seemed more complete to me, although I also chose to remove the backslash character as well (you both allowed it to remain when special characters were to be removed).

[snb]

Since languages are more complex than the A-Z alphabet:

Enum gt_lost
    Text = 0
    Numeric = 1
    Specialcharacters = 2
    ASCII_Text = 3
    non_numeric = 4
End Enum

Function RmChr(ByVal Str_chain As String, y As gt_lost) As String
    With CreateObject("VBScript.RegExp")
        .Global = True
        .Pattern = Array("[A-Za-z]", "\d", "[\" & Replace(StrConv("~!@#$%^&*()'-={}[]:""+;'<>?,./\|¦", 64), vbNullChar, "+\") & " ]", "\D+ ", "\D")(y)
        RmChr = .Replace(Str_chain, "")
    End With
End Function

Sub M_snb()
    MsgBox RmChr("aa~d  SDRT|éëïsdf 7\77ll""ll9 3 4,799 9@á¦#(*", 4)
End Sub