How to get meta:resourcekey's value in code behind

Hi,
In ASP.NET, I'm trying to get resourcekey value in code behind (C# or VB.NET).
Ex: with asp.net code below, I want to have value: "myLabelResource1" in code at runtime in generic way.
<asp:Label ID="myLabel" runat="server" Text="This text is localizable" meta:resourcekey="myLabelResource1"> </asp:Label>

Thanks,
Nhan