Option Explicit

Public Sub AddNewWorkBookTEST()

Dim nextline As Long, LastUsedRowList As Long
Dim CodeString As String

Dim x As Long
Dim KWATT As Double


Dim folderPath As String
folderPath = Application.ActiveWorkbook.Path

LastUsedRowList = Sheet4.Cells(Rows.Count, 1).End(xlUp).Row

For x = 1 To LastUsedRowList
    KWATT = Sheet4.Cells(x, 1)
    CodeString = CodeStringGenerator(KWATT)

    ''Update the module code
    With ActiveWorkbook.VBProject.VBComponents("MyNewTest").CodeModule
        .DeleteLines 1, .CountOfLines
    End With

    With ActiveWorkbook.VBProject.VBComponents("MyNewTest").CodeModule
        nextline = .CountOfLines + 1
        .InsertLines nextline, CodeString
    End With

CallOtherModule x
''Calling the function in the second module (where the code was copied).
'''Cannot call the function directly from this sub, since excel will crash:
Call MyNewTest.SortedArray(x)

Next x


End Sub

''''''''''''''''''''''''''''''''''''''''''''''''''''''
Public Sub CallOtherModule(ItemsCounter As Long)
    Call MyNewTest.SortedArray(ItemsCounter)
End Sub

''''''''''''''''''''''''''''''''''''''''''''''''''''''
'''The function that writes the code of the second module as String
Function CodeStringGenerator(KWATT As Double) As String

CodeStringGenerator = "'Option Explicit" & vbCrLf & "Public Function
SortedArray(ItemsCounter As Long) As Variant()" & vbCrLf & vbCrLf _
& "Dim TempSortedArray() As Variant" & vbCrLf _
& "Sheet4.Cells(ItemsCounter, 2) = " & KWATT + 5 & vbCrLf _
& "End Function" & vbCrLf

End Function