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Excel/Unprotect workbook with variables

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Question
Hello,
In Excel v2010, I have a workbook with 30 worksheets, each named after a sales rep (firstname lastname) e.g. Bob Smith.  Each sheet is protected with a password; I'm declaring variables in a module for both the username (which is the same as the sheet name) and password for the sheet.
The username variables are U1, U2, etc.  
The password variables are Up1, Up2, etc.
The following example is just for the 1st 2 sheets:

Public Const U1 As String = "Bob Smith"
Public Const U2 As String = "Linda Jones"
Public Const Up1 As String = "BS"  'password for Bob Smith
Public Const Up2 As String = "LJ"  'password for Linda Jones

Currently I have code that will unprotect each sheet, e.g.
Worksheets(U1).Unprotect Up1
Worksheets(U2).Unprotect Up2

While that code works, I'd much rather do this in a For Next loop; something like the following:
Dim x as string, y as string
For i = 1 to 30
x = "U"&i
y = "Up"&i
Worksheets(x).Unprotect y

But of course that doesn't work.
Obviously I'm doing something stupid; can you tell me what I'm doing wrong.
Many thanks for your expertise.

Answer
Hi Al

How are you?

Please try the following

Sub protectsheet()
For I = 1 To 30
y = "ABC" + LTrim(Str(I))
Worksheets(I).Protect y
Next I
End Sub

Sub unprotectsheet()
For I = 1 To 30
Worksheets(I).Unprotect "ABC" + LTrim(Str(I))
Next I
End Sub

cheers
Adelaide
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