To hide:

Sub Hide_Ws()
Sheets("Sheet1").Visible = xlSheetVeryHidden
End Sub

-------------

To unhide:

Sub Unhide_Ws()

Dim psword As String

psword = InputBox("Enter password to unhide worksheet.")
If psword = "" Then Exit Sub
If psword = "1234" Then
Sheets("Sheet1").Visible = True
Else
MsgBox "Incorrect password."
End If
End Sub

---
Note that when hiding the worksheet sheet, it sets it
at "veryhidden", meaning that it cannot be unhidden from
the Format menu. Password is currently set to "1234".

HTH
Jason
Atlanta, GA

-----Original Message-----
How do I hide a worksheet in Excel and use a password to
un-hide the worksheet?
.