I am french reseller of Rhino and I make my first plug-in into Rhino in C# Here is my issue : To make thumbnails of windows files I used a lot without troubles this routine : Bitmap myBitmap = myThumb.GetThumbnail(file.FullName);
For unknown reasons it doesn't works with Rhino V4 SDK :-(
but I don't know how to convert a Rhino type ONWindows Bitmap in .NET Bitmap type to display the thumbnail in a PictureBox. Any help will be appreciated.