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Have Visual Basic Assign a Purchase Order No.

I have a spreadsheet for ordering accessories. Right now I have a macro button that when clicked copies a number from worksheet 2, Cell A1 and pastes it on the order worksheet, it then goes back to sheet 2 and deletes row 1 so the purchase order number isnt used twice. The next time someone clicks the macro button labeled "Enter P.O." it will grab the next number in succession. On worksheet 2 I have numbers filled in from A1 down to A200.
Is there a way Visual Basic will assign a random number and make sure this number isnt repeated again?
Here is the macro I wrote below....
Sub Enter_Po_Number()
    Sheets("P.O. Nos").Visible = True
    Sheets("P.O. Nos").Select
    Range("A1").Select
    Selection.Copy
    Sheets("Access & Couplers").Select
    Range("I9").Select
    ActiveSheet.Paste
    Sheets("P.O. Nos").Select
    Rows("1:1").Select
    Application.CutCopyMode = False
    Selection.Delete Shift:=xlUp
    ActiveWindow.SelectedSheets.Visible = False
    Sheets("Access & Couplers").Select
End Sub

I guess Im looking for a way to eliminate this extra worksheet named "P.O. Nos" where I have Cells A1:A200 filled in with numbers and going to this worksheet later on when it reaches the end number.
Example....A1 has a number that reads Y6001 and A200 has the number Y6201.
Im not sure if Visual Bacic CAN assign random numbers that will NOT repeat themselves as you know its very scary to end up with two orders with the same Purchase Order.

Please Help
He4Giv@Aol.Com
0
He4Giv
Asked:
He4Giv
1 Solution
 
xSinbadCommented:
You could use the date and time functions like this.


Dim PoNumber
PoNumber = day(date)& month(date)& year(date)& minute(date) & second(date)

this produce a unique number baed on the date/time/secinds so that it will never be repeated again.

Cheers
Marcus

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superchookCommented:
I personally would use "yymmdd_HHnn" so that they sort easily e.g. "020320_1413.xxx"
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TimCotteeCommented:
If you really want random numbers then use this combination:

Private Sub CommandButton1_Click()
    Dim intColumn As Integer
    Dim strNumber As String
    intColumn = ActiveCell.Column
    strNumber = PONumber
    Do While Not (ActiveSheet.Columns(intColumn).Find(strNumber) Is Nothing)
        strNumber = PONumber
    Loop
    ActiveCell.Value = strNumber
End Sub

Public Function PONumber() As String
    Dim sngNumber As Single
    sngNumber = Rnd(Now) * 1000000
    PONumber = Format(sngNumber, "0000000")
End Function

All this does is generate a random number and test whether it exists in the column of the activecell. If it does then it gets another number and uses that.
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superchookCommented:
Or - of course use a GUID variable
32 digits (plus hyphens)
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He4GivAuthor Commented:
Im lost...Your answer looks well done and I pasted it into my Excel worksheet but I dont know how to get it running.
I never used Functions via Visual Basic.
I did add the CommandButton1 to a inserted blank worksheet but dont understand how to get it wroking?

He4Giv
0

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