Adding an event to Msg button from a client side?

[ascsolutions]

I have looked in many forums but can not find how to do this.
I need to add an event to the button of a MessageBox
Following is the code:

<DirectEvents>
<Click OnEvent "btnRecord_Click" Before = "Ext.Msg.wait ('Saving changes ...',' Recording');"
                                      Success = "Ext.Msg.show ({
                            title: 'Save'
                            msg: 'Your changes were saved successfully',
                            buttons: Ext.Msg.OK

                         }); "

</Click>
</DirectEvents>

By clicking OK, I reload my GridPanel this, or need to add an event to this button, but I can not. I have to do this at client side.

thank you