WM_CONTROL (in Value Set Controls) - Parameters

id (USHORT)

Value set control identity.

notifycode (USHORT)

Notify code.

The value set control uses these notification codes:

VN_DRAGLEAVE

The value set receives a DM_DRAGLEAVE message.
VN_DRAGOVER
The value set receives a DM_DRAGOVER message.
VN_DROP
The value set receives a DM_DROP message. The VN_DROP notification code is sent only when an item is dropped on an item that has the VIA_DROPONABLE attribute.
VN_DROPHELP
The value set receives a DM_DROPHELP message.
VN_ENTER
The user presses the Enter key while the value set window has the focus or double-clicks the select button while the pointer is over an item in the value set.
VN_HELP
The value set receives a WM_HELP message.
VN_INITDRAG
The drag button was pressed and the pointer was moved while the pointer was over the value set control. The VN_INITDRAG notification code is sent only for items that have the VIA_DRAGGABLE attribute.
VN_KILLFOCUS
The value set is losing the focus.
VN_SELECT
An item in the value set has been selected and is given selected-state emphasis.
VN_SETFOCUS
The value set receives the focus.

notifyinfo (ULONG)

Control-specific information.

When the value of the notifycode parameter is VN_DRAGOVER, VN_DRAGLEAVE, VN_DROP, or VN_DROPHELP, this parameter is a pointer to a VSDRAGINFO structure.

When the value of the notifycode parameter is VN_INITDRAG, this parameter is a pointer to a VSDRAGINIT structure.

When the value of the notifycode parameter is VN_ENTER, VN_HELP, or VN_SELECT, this parameter contains the row and column of the selection cursor. The low-order word contains the row index, and the high-order word contains the column index.

Otherwise, this parameter is the window handle (HWND) of the value set control.

ulReserved (ULONG)

Reserved value, should be 0.

---

[Back: WM_CONTROL (in Value Set Controls) Return Value - ulReserved]
[Next: WM_CONTROL (in Value Set Controls) - Syntax]