Question : Why am I getting this compile error?

my aspx page

          EnableViewState="False" Text="Email event notices to registered attendees"
        ValidationGroup="EventRegAttendee" Width="269px" OnClick="EmailRegAttendeeNotices()"/>
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my aspx inline code
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Compile error?
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Error      20      Argument not specified for parameter 'e' of 'Protected Sub EmailRegAttendeeNotices(sender As Object, e As System.EventArgs)'.      C:\Documents and Settings\Dennis West\Local Settings\Temp\VWDWebCache\cmaanorcalevents.com\DesktopModules\i2Integration - Events\user\Register.ascx      100      
Error      22      Argument not specified for parameter 'e' of 'Protected Sub EmailRegAttendeeNotices(sender As Object, e As System.EventArgs)'.      C:\Documents and Settings\Dennis West\Local Settings\Temp\VWDWebCache\cmaanorcalevents.com\DesktopModules\i2Integration - Events\user\Register.ascx      100      
Error      21      Argument not specified for parameter 'sender' of 'Protected Sub EmailRegAttendeeNotices(sender As Object, e As System.EventArgs)'.      C:\Documents and Settings\Dennis West\Local Settings\Temp\VWDWebCache\cmaanorcalevents.com\DesktopModules\i2Integration - Events\user\Register.ascx      100      
Error      23      Argument not specified for parameter 'sender' of 'Protected Sub EmailRegAttendeeNotices(sender As Object, e As System.EventArgs)'.      C:\Documents and Settings\Dennis West\Local Settings\Temp\VWDWebCache\cmaanorcalevents.com\DesktopModules\i2Integration - Events\user\Register.ascx      100      
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Answer : Why am I getting this compile error?

you should add  Handles btn.click I guess

Protected Sub EmailRegAttendeeNotices_Click(ByVal sender As Object, ByVal e As EventArgs)
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Protected Sub EmailRegAttendeeNotices_Click(ByVal sender As Object, ByVal e As EventArgs) handles Button1.click