how to make Combobox work for merged cells having data validation to increase font size.

Hi All,
I have found below code online, which checks if cell has data validation. It it has, it will make combo box visible and font size in drop down will increase. But this code does not work for merged cells.
Please suggest correction to be made. There is also another code which works fine, but is based on double click event. I want to be it on selection event, so that if cells have validation, it will instantly show combo box. I am providing both the codes.

Code 1: does not work for Merged cells.
Sub Worksheet_SelectionChange(ByVal Target As Range)
Dim str As String
Dim cboTemp As OLEObject
Dim ws As Worksheet
Set ws = ActiveSheet
On Error GoTo errHandler

If Target.Count > 1 Then GoTo exitHandler

Set cboTemp = ws.OLEObjects("TempCombo")
On Error Resume Next
If cboTemp.Visible = True Then
With cboTemp
.Top = 10
.Left = 10
.ListFillRange = ""
.LinkedCell = ""
.Visible = False
.Value = ""
End With
End If

On Error GoTo errHandler
If Target.Validation.Type = 3 Then
'if the cell contains a data validation list
Application.EnableEvents = False
'get the data validation formula
str = Target.Validation.Formula1
str = Right(str, Len(str) - 1)
With cboTemp
'show the combobox with the list
.Visible = True
.Left = Target.Left
.Top = Target.Top
.Width = Target.Width + 15
.Height = Target.Height + 5
.ListFillRange = ws.Range(str).Address
.LinkedCell = Target.Address
End With
cboTemp.Activate
'open the drop down list automatically
Me.TempCombo.DropDown
End If

exitHandler:
Application.ScreenUpdating = True
Application.EnableEvents = True
Exit Sub
errHandler:
Resume exitHandler

End Sub
'====================================
'Optional code to move to next cell if Tab or Enter are pressed
'from code by Ted Lanham
'***NOTE: if KeyDown causes problems, change to KeyUp
'Table with numbers for other keys such as Right Arrow (39)
'https://msdn.microsoft.com/en-us/library/aa243025%28v=vs.60%29.aspx

Private Sub TempCombo_KeyDown(ByVal _
KeyCode As MSForms.ReturnInteger, _
ByVal Shift As Integer)
Select Case KeyCode
Case 9 'Tab
ActiveCell.Offset(0, 1).Activate
Case 13 'Enter
ActiveCell.Offset(1, 0).Activate
Case Else
'do nothing
End Select
End Sub

2. Code works for both Merge and UN merge cells.

'==========================
Private Sub Worksheet_BeforeDoubleClick(ByVal Target As Range, _
Cancel As Boolean)
Dim str As String
Dim cboTemp As OLEObject
Dim ws As Worksheet
Dim Tgt As Range
Set Tgt = Target.Cells(1, 1)
Set ws = ActiveSheet
On Error GoTo errHandler

If Tgt.Validation.Type = 3 Then
Cancel = True
End If

Set cboTemp = ws.OLEObjects("TempCombo")
On Error Resume Next
With cboTemp
.ListFillRange = ""
.LinkedCell = ""
.Visible = False
End With
On Error GoTo errHandler

If Tgt.Validation.Type = 3 Then
Application.EnableEvents = False
str = Tgt.Validation.Formula1
str = Right(str, Len(str) - 1)
With cboTemp
.Visible = True
.Left = Tgt.Left
.Top = Tgt.Top
.Width = Target.Width + 15
.Height = Target.Height + 5
.ListFillRange = ws.Range(str).Address
.LinkedCell = Tgt.Address
End With
cboTemp.Activate
'open the drop down list automatically
Me.TempCombo.DropDown
End If

errHandler:
Application.EnableEvents = True
Exit Sub

End Sub
'=========================================
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
Dim str As String
Dim cboTemp As OLEObject
Dim ws As Worksheet
Set ws = ActiveSheet

Set cboTemp = ws.OLEObjects("TempCombo")
On Error Resume Next
If cboTemp.Visible = True Then
With cboTemp
.Top = 10
.Left = 10
.ListFillRange = ""
.LinkedCell = ""
.Visible = False
.Value = ""
End With
End If

errHandler:
Application.EnableEvents = True
Exit Sub

End Sub

Hi xladept,
Thanks, that works.