Support for high DPI taskpanes
Office now supports high-DPI and per-monitor DPI awareness, but custom task-panes do not. Add-in custom task panes are always hosted in a system aware host window and there is no way to indicate our add-in is high-DPI and multi-monitor DPI aware. Our customers therefore only see a low resolution user interface in the task panes. The Excel built-in task panes support high-DPI so this shouldn't be too difficult, maybe a registry setting indicating the add-in supports high-DPI or even an extra parameter to ICTPFactory.CreateCTP indicating support.
there is still and issue with scaling between 2 monitors for office apps