Revokes the registration of the specified application window as a potential
target for OLE drag and drop operations.
| HWND hwnd
||//Window that can accept drops
Specifies the handle to a window previously registered as a target for an OLE
drag and drop operation.
Indicates registration as a target window was revoked successfully.
Indicates invalid handle returned in the hwnd
Indicates an attempt was made to revoke a drop target that has not been
Out of memory.
When your application window is no longer available as a potential target for
an OLE drag and drop operation, you must call RevokeDragDrop
This function calls the IUnknown::Release
method for your drop target interface.
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