dear Microsoft,
I wish to report this bug concerning custom task pane in Excel 2013.
We have a custom task pane in COM Add-In. Problem is, the task pane will not show if any of Excel Add-Ins are enabled. If all the Excel Add-In are disabled, task pane will show up.
But we cannot do this as this application requires an Excel Add-In to be enabled! The application has both Excel and COM Add-Ins. Things have always been working well in Excel 2010.
This behavior is also observed when using the simplest custom task pane from MSDN examples:
myUserControl1 = new MyUserControl(); myCustomTaskPane = this.CustomTaskPanes.Add(myUserControl1, "My Task Pane"); myCustomTaskPane.Visible = true;
My take is that when Excel Add-In is enabled, the loading of the Add-In somehow interferes with the visibility of the custom task pane; Excel does not know how to park the custom task pane. There is a bug somewhere !
Do test this out; I 'm sure you can reproduce this on your end.
Please advise what do we do now as my company is planning to roll out Office 2013 in March.
regards
Ethan Shum