How to move from one control to another in a form on a worksheet using tab and shift keys coded with VBA.

Here’s the complete VBA code:
Private Sub cboItemName_KeyDown(ByVal KeyCode As MSForms.ReturnInteger, ByVal Shift As Integer)
If KeyCode = vbKeyTab Then
Me.cboMfg.Activate
End If

End Sub

Private Sub cboMfg_KeyDown(ByVal KeyCode As MSForms.ReturnInteger, ByVal Shift As Integer)
If Shift = 0 And KeyCode = vbKeyTab Then
Me.txtBatchNo.Activate

ElseIf Shift = 1 And KeyCode = vbKeyTab Then
Me.cboItemName.Activate
End If

End Sub

Private Sub txtBatchNo_KeyDown(ByVal KeyCode As MSForms.ReturnInteger, ByVal Shift As Integer)
If Shift = 0 And KeyCode = vbKeyTab Then
Me.txtExpiryDate.Activate
ElseIf Shift = 1 And KeyCode = vbKeyTab Then
Me.cboMfg.Activate
End If
End Sub

Private Sub txtExpiryDate_KeyDown(ByVal KeyCode As MSForms.ReturnInteger, ByVal Shift As Integer)
If Shift = 0 And KeyCode = vbKeyTab Then
Me.txtMRP.Activate
ElseIf Shift = 1 And KeyCode = vbKeyTab Then
Me.txtBatchNo.Activate
End If
End Sub

Private Sub txtMRP_KeyDown(ByVal KeyCode As MSForms.ReturnInteger, ByVal Shift As Integer)
If Shift = 0 And KeyCode = vbKeyTab Then
Me.txtPurchaseDate.Activate
ElseIf Shift = 1 And KeyCode = vbKeyTab Then
Me.txtExpiryDate.Activate
End If
End Sub

Private Sub txtPurchaseDate_KeyDown(ByVal KeyCode As MSForms.ReturnInteger, ByVal Shift As Integer)
If Shift = 0 And KeyCode = vbKeyTab Then
Me.txtQty.Activate
ElseIf Shift = 1 And KeyCode = vbKeyTab Then
Me.txtMRP.Activate
End If
End Sub

Private Sub txtQty_KeyDown(ByVal KeyCode As MSForms.ReturnInteger, ByVal Shift As Integer)
If Shift = 1 And KeyCode = vbKeyTab Then
Me.txtPurchaseDate.Activate
End If
End Sub