wpDrop Return Value - rc
rc (MRESULT) - returns
Return code.
RC_DROP_DROPCOMPLETE
All objects in the drag set
have been dropped successfully. wpDrop is not called for the next item in
the drop set, and pdrgInfo is not freed.
RC_DROP_ERROR
An error occurred while processing the drop operation.
The drop operation is terminated, wpDrop is not called for the next item
in the drop set, and pdrgInfo is freed.
RC_DROP_ITEMCOMPLETE
One object in the drag set, specified by pdrgItem,
has been dropped successfully. pdrgInfo is freed after all objects
in the drop set have been dropped.
RC_DROP_RENDERING
The object being dropped has asked for a rendering
of the source object. wpDrop is called for the next item in the drop set,
pdrgInfo is freed after all objects in the drop set have been dropped.
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