求助！遍历txt里的字符，只保留数字、字母、和汉字，删除其他字符（如回车，空格等）

'Kp输出
Public Sub passive_Kp_output(error_happen As Boolean, bottom_layer As Integer, layers_number As Integer, H() As Double, Kp() As Double, soil_name() As String)
If layers_number = 0 Then
    Exit Sub
Else

 Form1.Text1.Text = Form1.Text1.Text & vbCrLf & "1.2各土层Kp值" & vbCrLf
    For i = 1 To layers_number - bottom_layer + 1 Step 1
        If i = 1 Then
            For j = 1 To bottom_layer Step 1
                temp = temp + H(j)
            Next j
            first_in_layers_thickness = temp - L '第一层坑内土表面到该层层底的实际厚度
            Form1.Text1.Text = Form1.Text1.Text & "第" & i & "层(" & first_in_layers_thickness & "m" & soil_name(i + bottom_layer - 1) & ")：" & "  "
            Form1.Text1.Text = Form1.Text1.Text & "Kp_" & i & "=" & Format(Kp(i), "0.000") & vbCrLf
        Else
            Form1.Text1.Text = Form1.Text1.Text & "第" & i & "层(" & H(i + bottom_layer - 1) & "m" & soil_name(i + bottom_layer - 1) & ")：" & "  "
            Form1.Text1.Text = Form1.Text1.Text & "Kp_" & i & "=" & Format(Kp(i), "0.000") & vbCrLf
        End If
    Next i
End If
End Sub