Displays the system menu for the specified files at position x,y. This menu is the same as that displayed when right-clicking a selection of files in Windows Explorer
Use Flags to customize the items of the popup menu using CMF_* constants, such as CMF_CANRENAME. Default is: CMF_EXPLORE or CMF_CANRENAME.
Result is false if the item cannot be displayed, e.g. due to an invalid file selection.