The need is to open the dialog on a directory location. I.e.: `WinFileDialog>>openFolder: aFileReference` From this [thread](https://www.developpez.net/forums/d872217/dotnet/langages/vb-net/vb2008-structure-browseinfo-p-repertoire-defaut/) and [this documentation](https://argyronet.developpez.com/office/vba/powerpoint/diaporama/#L3-2) it's appears not easy and need a "callback" system.