CN DROPHELP: Difference between revisions
Created page with "This message is sent by the container control to its owner when the container receives a DM_DROPHELP message. ==Syntax== <PRE> param1 USHORT id; →Container control ID.: USHORT CN_DROPHELP; →Notification code.: param2 PCNRDRAGINFO pCnrDragInfo; →Pointer to a CNRDRAGINFO structure.: </PRE> ==Parameters== ;id (USHORT) - Input : Container control ID. ;CN_DROPHELP (USHORT) - Input : Notification code. ;pCnrDragInfo (PCNRDRAGINFO) - I..." |
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;CN_DROPHELP ([[USHORT]]) - Input | ;CN_DROPHELP ([[USHORT]]) - Input | ||
: Notification code. | : Notification code. | ||
;pCnrDragInfo ([[ | ;pCnrDragInfo (P[[CNRDRAGINFO]]) - Input | ||
: Pointer to a [[CNRDRAGINFO]] structure. | : Pointer to a [[CNRDRAGINFO]] structure. | ||
Latest revision as of 22:02, 20 April 2025
This message is sent by the container control to its owner when the container receives a DM_DROPHELP message.
Syntax
param1 USHORT id; /* Container control ID. */ USHORT CN_DROPHELP; /* Notification code. */ param2 PCNRDRAGINFO pCnrDragInfo; /* Pointer to a CNRDRAGINFO structure. */
Parameters
- id (USHORT) - Input
- Container control ID.
- CN_DROPHELP (USHORT) - Input
- Notification code.
- pCnrDragInfo (PCNRDRAGINFO) - Input
- Pointer to a CNRDRAGINFO structure.
Returns
- ulReserved (ULONG) - returns
- Reserved value, should be 0.
Remarks
This notification code is sent to the container's owner when help for direct manipulation is requested over the container window.
Default Processing
The default window procedure does not expect to receive this notification code and therefore takes no action on it other than to return 0.