Assume you have a listbox on worksheet1 that contains the month names. the
listbox has the multiselect property set to fmMultiSelectMulti

Assume the first entry in the listbox is at column 10 on each sheet and the
months are in sequential columns. Further assume that all sheets in the
workbook have the month columns on them except the sheet with the listbox.
Either of the below should do what you want.

Private Sub CommandButton2_Click()
For Each sh In ThisWorkbook.Worksheets
If sh.Name < Me.Name Then
sh.Columns.Hidden = False
End If
Next
For i = 0 To ListBox1.ListCount - 1
If ListBox1.Selected(i) Then
For Each sh In ThisWorkbook.Worksheets
If sh.Name < Me.Name Then
sh.Columns(i + 10).Hidden = True
End If
Next
End If
Next
End Sub

If you wanted to write more code, you could make a list of the columns and
avoid multiple loops through the sheets.

Private Sub CommandButton1_Click()
Dim rng As Range
For i = 0 To ListBox1.ListCount - 1
If ListBox1.Selected(i) Then
If rng Is Nothing Then
Set rng = Columns(i + 10)
Else
Set rng = Union(rng, Columns(i + 10))
End If
End If
Next
If Not rng Is Nothing Then
For Each sh In ThisWorkbook.Worksheets
If sh.Name < Me.Name Then
sh.Columns.Hidden = False
sh.Range(rng.Address).EntireColumn.Hidden = True
End If
Next
End If
End Sub

--
Regards,
Tom Ogilvy



"Kevin" wrote in message
...
This seems like a simple thing to do, but I can't figure
it out on my own. Basically, I have multiple worksheets,
with successive months across the columns, and
corresponding data beneath. I want the user to be able to
quickly and automatically hide certain months in all of
the worksheets.

I was thinking of making seperate macros that hide
individual months, then having check boxes on a new
worksheet so that a user could just check the one he wants
to include/hide, then press a button, and it will run the
appropriate macros. I can make the macros, I just don't
know how to do some sort of "if" that will determine which
ones to run.

Ideally, I was hoping to just have a list box and have the
user select whatever months to inclue in this, but I
couldn't even get started on this, so I started the other
way. If you can help me with either of these methods, or
a different one, I will greatly appreciate it. Thanks.