CN HELP: Difference between revisions
Created page with "This message is sent by the container control to its owner whenever the container receives a WM_HELP message. ==Syntax== <PRE> param1 USHORT id; →Container control ID.: USHORT CN_HELP; →Notification code.: param2 PRECORDCORE pRecord; →Pointer to the record that has the selection cursor.: </PRE> ==Parameters== ;id (USHORT) - Input : Container control ID. ;CN_HELP (USHORT) - Input : Notification code. ;pRecord (PRECORDCORE) - Input : Po..." |
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Revision as of 20:39, 20 April 2025
This message is sent by the container control to its owner whenever the container receives a WM_HELP message.
Syntax
param1 USHORT id; /* Container control ID. */ USHORT CN_HELP; /* Notification code. */ param2 PRECORDCORE pRecord; /* Pointer to the record that has the selection cursor. */
Parameters
- id (USHORT) - Input
- Container control ID.
- CN_HELP (USHORT) - Input
- Notification code.
- pRecord (PRECORDCORE) - Input
- Pointer to the record that has the selection cursor.
- Note: If the CCS_MINIRECORDCORE style bit is specified when a container is created, then MINIRECORDCORE should be used instead of RECORDCORE and PMINIRECORDCORE should be used instead of PRECORDCORE in all applicable data structures and messages.
Returns
- ulReserved (ULONG) - returns
- Reserved value, should be 0.
Remarks
This notification code is sent to the container's owner when help is requested for a container item.
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.