ulAction (ULONG)

Flag.

DRR_SOURCE

The source window procedure/object procedure will take responsibility for the print operation.
DRR_TARGET
The target printer object will take responsibility for the print operation (this will only work on objects which are of the pre-registered rendering method; "DRM_OS2FILE".
DRR_ABORT
Abort the entire DM_DROP action (do not send any more DM_PRINTOBJECT messages to any selected source object involved in this DM_DROP.

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