我遇到了这个问题https://social.msdn.microsoft.com/Forums/vstudio/en-US/e417e686-032c-4324-b778-fef66c7687cd/excel-customtaskpane-with-webbrowser-control-keyboardfocus-issues?forum=vsto这里也提到了https://connect.microsoft.com/VisualStudio/feedback/details/521465/the-focus-issue-between-excel-cells-and-excel-c