CBN_DROPDOWN

CBN_DROPDOWN

idComboBox = LOWORD(wParam);

hwndComboBox = (HWND)lParam;

The CBN_DROPDOWN notification message is sent when the list box of a combo box is about to be dropped down (made visible). The parent window of the combo box receives this notification message through a WM_COMMAND message.

Parameters

idComboBox

Value of low word of wParam. Specifies the combo-box ID.

hwndComboBox

Value of lParam. Specifies the combo-box window handle.

Comments

This message does not occur if the combo box does not contain a drop-down list box.

See Also

WM_COMMAND