I have been struggling to find a hook that allows me to add a button to the top of the woocommerce admin "orders page", but so far unsuccessfully. I have found hooks to add action buttons to the action column, as well as inside each orders page ... but not where I need now.
If there is no hook, then an alternative approach.
More specifically, I attach an image with the place I am referring to
Any suggestions?
解決方案
Because this is related to Wordpress and not specific to Woocommerce as Orders are just a custom post type. so the following code will display a custom button on the top zone just after existing fields and buttons: