[ros-kernel] Explorer build errors

[Skywing]

Using latest CVS version...

dragdropimpl.o(.text+0x10b7):dragdropimpl.cpp: undefined reference to
`IID_IDropTargetHelper'
dragdropimpl.o(.text+0x10c0):dragdropimpl.cpp: undefined reference to
`CLSID_DragDropHelper'
dragdropimpl.o(.text+0x11cd):dragdropimpl.cpp: undefined reference to
`IID_IDropTargetHelper'
dragdropimpl.o(.text+0x11d6):dragdropimpl.cpp: undefined reference to
`CLSID_DragDropHelper'
mingw32-make.exe[1]: *** [explorer.exe] Error 1
mingw32-make.exe[1]: Leaving directory `C:/Documents and Settings/Skywing/My
Documents/Visual Studio Projects/reactos/subsys/system/explorer'
mingw32-make.exe: *** [explorer] Error 2