I want to prompt the user to enter a date from a message box, have the entry
be validated with pre-entered data in cells, and once verified, write the
date to one cell.
The pre-entered data is on worksheet "Index" in column G, rows 2-53. The
data are all the Sunday dates in 2006 in mmm-dd-yy format. I want to write
the result to worksheet "Global Setup" cell E5. The index sheet is normally
hidden and password protected.
Here is what I have so far:

Dim wCtr As Long
Dim iOffice As Integer, iDate As Date, iValue
Dim password As String

Application.ScreenUpdating = False

Worksheets("Global Setup").Select
Range("CA3").Select
password = Range("CA3").Value

ActiveSheet.Unprotect (password)

Worksheets("index").Visible = xlSheetVisible

Worksheets("Global Setup").Select
Range("E5").Select

iDate = CLng(Application.InputBox(prompt:="Enter the Date of the Next
SUNDAY. (mm/dd/yy) Are you Ready?", Type:=1))

Msg = "Enter the Date of the Next SUNDAY. (mm/dd/yy) Are you Ready?"
Ans = MsgBox(Msg, vbYesNo)
If Ans = vbNo Then Exit Sub

' check iDate - Variance to matched row and column
With wbSum.Sheets(2)
Dim lastrow As Long, lastcol As Long, xV As Long, xR As Long, xC As Long
lastrow = .Cells(Rows.Count, 1).End(xlUp).Row
lastcol = .Cells(1, Columns.Count).End(xlToLeft).Column

' get matching column
For xV = 1 To lastcol
If iDate = .Cells(1, xV) Then xC = xV
Next xV
If xC = 0 Then MsgBox "Date: " & iDate & " not found in Date table"

End With

Worksheets("Global Setup").Select
Range("E5").Select = iDate

ActiveSheet.Protect (password)
'
End Sub