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CN DROPHELP

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Revision as of 21:31, 20 April 2025 by Martini (talk | contribs) (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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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.

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