private void OpenItemContextMenu(ShellItem itemHit, int x, int y)
{
// TODO: we need a min and max for the menu items.
// see http://www.codeproject.com/Articles/4025/Use-Shell-ContextMenu-in-your-applications for more
// The shell folder we use to get the UI object is either the folder itself if the
// item is a folder, or the parent folder otherwise.
var shellFolder = itemHit.IsFolder ? itemHit.ShellFolderInterface : itemHit.ParentItem.ShellFolderInterface;
// The item pidl is either the folder if the item is a folder, or the combined pidl otherwise.
var fullIdList = itemHit.IsFolder
? PidlManager.PidlToIdlist(itemHit.PIDL)
: PidlManager.Combine(PidlManager.PidlToIdlist(itemHit.ParentItem.PIDL),
PidlManager.PidlToIdlist(itemHit.RelativePIDL));
// Get the UI object of the context menu.
IntPtr apidl = PidlManager.PidlsToAPidl(new IntPtr[] { PidlManager.IdListToPidl(fullIdList) });
IntPtr ppv = IntPtr.Zero;
shellFolder.GetUIObjectOf(Handle, 1, apidl, Shell32.IID_IContextMenu, 0,
out ppv);
// If we have an item, cast it.
if (ppv != IntPtr.Zero)
{
IContextMenu contextMenu = (IContextMenu)Marshal.GetObjectForIUnknown(ppv);
var popupMenu = new ContextMenu();
contextMenu.QueryContextMenu(popupMenu.Handle, 0, 0, 65525, CMF.CMF_EXPLORE);
popupMenu.Show(this, new Point(x, y));
}
}