excel macro

Hello, I am trying to create a macro that will change when the user only uses the drop down and it will populate the row with data from the vlookup. I have the following code but am stuck like braindead. Im learning and could use an experts help! Thanks!

Private Sub Worksheet_Change(ByVal NameBox As Range)
       
      
       Dim c As Range
       Range ("c4:m4")
     'For Each c In Range("c4:m4")
     'If Not IsNumeric(c) Then
     c.ClearContents
  '   Next c
'End If
             Insert_Block
       End Sub


Option Explicit
    Const SUMMARY_COLOR = 48
    Const DETAIL_COLOR = 36

Sub Insert_Block()
   
   
   
        

   With Range("C4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,3,FALSE)"
      .Value = .Value
       End With
      With Range("D4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,4,FALSE)"
      .Value = .Value
       End With
      With Range("E4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,5,FALSE)"
      .Value = .Value
       End With
      With Range("F4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,6,FALSE)"
      .Value = .Value
       End With
      With Range("G4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,7,FALSE)"
      .Value = .Value
       End With
      With Range("H4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,8,FALSE)"
      .Value = .Value
       End With
      With Range("I4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,9,FALSE)"
      .Value = .Value
       End With
      With Range("J4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,10,FALSE)"
      .Value = .Value
       End With
      With Range("K4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,11,FALSE)"
      .Value = .Value
       End With
      With Range("L4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,12,FALSE)"
      .Value = .Value
       End With
      With Range("M4")
      .Formula = "=VLOOKUP( B4,'EXCEPTION % SUMMARY'!$A:$N,13,FALSE)"
      .Value = .Value
    
    End With
   
     
    
End Sub

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