Check values in a range before continuing - vba

Question

So right now I have an excel workbook for a task tracker. When the column that contains the completed date is filled in, it will take that row and copy it onto another sheet ("Complete") then delete it off the current sheet ("Current"). What I would like it to do before this is executed is check the values of columns H through M for either a "C" or "U". If any of the Cells in that range do not contain either or, then I want it to exit out and display a message. I am not to familiar with Excel or VBA, but decent with C++.
Here is the code as of right now:
Private Sub Worksheet_Change(ByVal Target As Range)
Application.EnableEvents = False
Dim receivedDate As Range, nextOpen As Range, isect As Range
Set receivedDate = Sheet1.Range("G3:G166")
Set isect = Application.Intersect(Target, receivedDate)
If Not (isect Is Nothing) And IsDate(Target) = True Then
Set nextOpen = Sheet4.Range("A" & Rows.Count).End(xlUp).Offset(1, 0)
Target.EntireRow.Copy Destination:=nextOpen.EntireRow
Target.EntireRow.Delete
End If
Application.EnableEvents = True
End Sub
Here is snip of what I have going on...
snip of work
Any help would be greatly appreciated. Sorry I tried looking around some.

Answer 1

Edit - more robust, added error handler and multi-cell update handling
Private Sub Worksheet_Change(ByVal Target As Range)
Dim receivedDate As Range, nextOpen As Range, isect As Range
Dim rngHM As Range, c As Range, rngDel As Range
Set receivedDate = Sheet1.Range("G3:G166")
'are any of the changed cells in the range we're monitoring?
Set isect = Application.Intersect(Target, receivedDate)
On Error GoTo haveError 'error handler ensures events get re-enabled...
'### remember that Target can contain >1 cell...
For Each c In isect.Cells
If IsDate(c.Value) Then
With c.EntireRow
Set rngHM = .Cells(1, "H").Resize(1, 6)
'EDIT: all cells must be C or U
If (Application.CountIf(rngHM, "C") + _
Application.CountIf(rngHM, "U")) <> rngHM.Cells.Count Then
MsgBox "No C or U on row " & c.Row & " !"
Else
Set nextOpen = Sheet4.Range("A" & Rows.Count) _
.End(xlUp).Offset(1, 0)
.Copy Destination:=nextOpen.EntireRow
'deleting rows while looping gives odd results,
' so store them up until done...
If rngDel Is Nothing Then
Set rngDel = c
Else
Set rngDel = Application.Union(rngDel, c)
End If
End If
End With 'entirerow
End If 'is date
Next c
'delete any copied rows in a single operation
If Not rngDel Is Nothing Then
Application.EnableEvents = False
rngDel.EntireRow.Delete
Application.EnableEvents = True
End If
Exit Sub
haveError:
'if your code errors out then this makes sure event handling gets reset
Application.EnableEvents = True
End Sub