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need help moving code behind to seperate file

Posted By:      Posted Date: October 21, 2010    Points: 0   Category :ASP.Net

I am using some code I found that generates a random password.  I  am in the habit of putting code in a seperate file.  The code was written in the same file and I'm trying to move it to a seperate file and get the following message.  Also, below, I posted the original code (code on same page as aspx) and what I did (code in seperate file).  Can someone tell me what adjustment needs to be made to make the seperate code file work?

********THE MESSAGE********************************************************

Compiler Error Message: BC31143: Method 'Public Function GeneratePassword(length As Integer, numberOfNonAlphanumericCharacters As Integer) As String' does not have a signature compatible with delegate 'Delegate Sub EventHandler(sender As Object, e As System.EventArgs)'.

Source Error:

Line 32: 	</asp:DropDownList>
Line 33:   <p>
Line 34:   <asp:Button ID="Button1" runat="server" Text="Generate Random Password" OnClick="GeneratePassword" />
Line 35:   <p>
Line 36:   Your random password: <asp:Label runat="server" id="RandPassword" Font-Size="x-large" Font-Bold="True" />  

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