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I'm using the tkchooseDirectory in a Shiny application to select a folder for importing a data file (on a windows 8 PC). This works fine, except that the popup dialog for selecting the folder appears below the browser window, or below the R studio window if run from there. The dialog does not appear as an icon on the taskbar, so I have to minimize whatever windows it hides behind before I can access it. Is there any way to make sure it pops up on top?