Drag-and-Drop Handlers

If you know how to implement a context menu handler, implementing a drag-and-drop handler is a piece of cake. Drag-and-drop handlers are context menu handlers that are accessed when a user drops an object after dragging it to a new location. The two kinds of handlers differ only in how you register them. You must use the DragDropHandlers key to register a drag-and-drop handler, as you can see in this sample REG file:

REGEDIT4



[HKEY_CLASSES_ROOT\CLSID\{<CLSID value>}]

@="Sample Context Menu"

[HKEY_CLASSES_ROOT\CLSID\{<CLSID value>}\InprocServer32]

@="c:\\windows\\system\\ctxtmenu.dll"

"ThreadingModel"="Apartment"



[HKEY_CLASSES_ROOT\.NWC]

@="NWCFile"

[HKEY_CLASSES_ROOT\NWCFile]

@="Shell Extension file"

[HKEY_CLASSES_ROOT\NWCFile\shellex\DragDropHandlers]

@="NWCDD"

[HKEY_CLASSES_ROOT\NWCFile\shellex\DragDropHandlers\NWCDD]

@="{<CLSID value>}"