New Post: Custom Task Pane query in NetOffice

I was just having the same issue, and thanks to a post of SebastionDotNet somewhere here (of which for some reason I can't find the link any more) I solved the problem. You can do the following:

• add a public property to your myuserControl: Public TaskPane As Office._CustomTaskPane
• in your Public Sub CTPFactoryAvailable add a line myuserControl.TaskPane = taskPane and remove the ctpFactory.Dispose()
  

Then you should be able change the visibility with myuserControl.TaskPane.visible = true/false