The submit button is available in the current context, because the control has been exposed as a public property after 3.6. Before that there was a generic container that should be used.
Override InitializeContrls and replace the event as shown in this forum post
, because this is the only way to avoid the click from the base.
I made SubmitButton command virtual which will allow you to hook with the next SP ( it is not scheduled yet)
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