I have seen several times that an add-in can create sub-windows in Excel. Here is an exemple:
Does anyone know which technique allows the add-in to create the sub-windows on the right hand side?
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):
问题:
回答1:
This technique is CustomTaskPanes
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