CN PICKUP

This message is sent by the container control to its owner when a pickup and drop operation is initiated over a container.

Syntax

param1
USHORT id;           /* Container control ID. */
USHORT CN_PICKUP;    /* Notification code. */

param2
PCNRDRAGINIT pCnrDragInit; /* Pointer to the CNRDRAGINIT structure containing direct-manipulation information initiated in a container. */

returns
ULONG ulReserved;    /* Reserved value, must be 0. */

Parameters

id (USHORT) - Input

Container control ID.

CN_PICKUP (USHORT) - Input

Notification code.

pCnrDragInit (PCNRDRAGINIT) - Input

Pointer to the CNRDRAGINIT structure containing direct-manipulation information initiated in a container.

The CNRDRAGINIT structure is the same as the one used for standard drag notifications.

Returns

ulReserved (ULONG) - returns

Reserved value, must be 0.

Remarks

This notification code is sent to the owner of the container when a lazy drag operation is commenced over a container. (The container control receives a WM_PICKUP message.)

The CN_PICKUP message handler determines if the mouse is over an object or in white space of the client window.

If a pickup object is not selected, only that pickup object is added to the lazy drag set. If the pickup object is selected, all selected items in the container are added to the lazy drag set. The shell sets the CRA_PICKED attributes for all objects that are picked.

Default Processing

The default message procedure sets ulReserved to 0.