DM DISCARDOBJECT: Difference between revisions
Created page with "This message is sent to a source that supports the "DRM_DISCARD" rendering method. ==Syntax== <PRE> param1 PDRAGINFO pDragInfo; →Pointer to the DRAGINFO structure representing the items to be discarded.: mpparam2 MPARAM ulReserved; →Reserved value, should be NULL.: </PRE> ==Parameters== ;pDragInfo (PDRAGINFO) - Input : Pointer to the DRAGINFO structure representing the items to be discarded. ;ulReserved (MPARAM) - Input : Reserved value, should..." |
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==Parameters== | ==Parameters== | ||
;pDragInfo ([[ | ;pDragInfo (P[[DRAGINFO]]) - Input | ||
: Pointer to the [[DRAGINFO]] structure representing the items to be discarded. | : Pointer to the [[DRAGINFO]] structure representing the items to be discarded. | ||
;ulReserved ([[MPARAM]]) - Input | ;ulReserved ([[MPARAM]]) - Input | ||
Latest revision as of 22:31, 20 April 2025
This message is sent to a source that supports the "DRM_DISCARD" rendering method.
Syntax
param1 PDRAGINFO pDragInfo; /* Pointer to the DRAGINFO structure representing the items to be discarded. */ mpparam2 MPARAM ulReserved; /* Reserved value, should be NULL. */
Parameters
- pDragInfo (PDRAGINFO) - Input
- Pointer to the DRAGINFO structure representing the items to be discarded.
- ulReserved (MPARAM) - Input
- Reserved value, should be NULL.
Returns
- ulAction (ULONG) - returns
- Flag.
- DRR_SOURCE: The source window procedure accepts responsibility for the operation.
- DRR_TARGET: The target window procedure is to accept responsibility for the operation. The OS/2 shell supports the discarding of dragitems that can be rendered by the DRM_OS2FILE method.
- DRR_ABORT: Abort the entire DM_DROP action.
Remarks
This message is sent to the source window for the drag action. The source should make a copy of the parameters and return. The source should also create a separate thread to execute the discard action if it responds with DRR_SOURCE.
Default Processing
The WinDefWindowProc function does not expect to receive this message and takes no action on it, other than to set ulAction to the default value of NULL.