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WM_VKEYTOITEM Overview  Group

The WM_VKEYTOITEM message is sent by a list box with the LBS_WANTKEYBOARDINPUT style to its owner in response to a WM_KEYDOWN message.

WM_VKEYTOITEM 

vkey = LOWORD(wParam);      // virtual-key code 

nCaretPos = HIWORD(wParam); // caret position 

hwndLB = lParam;            // handle of list box 

 

Parameters

vkey
Value of the low-order word of wParam. Specifies the virtual-key code of the key the user pressed.
nCaretPos
Value of the high-order word of wParam. Specifies the current position of the caret.
hwndLB
Value of lParam. Identifies the list box.

Return Values

The return value specifies the action that the application performed in response to the message. A return value of -2 indicates that the application handled all aspects of selecting the item and requires no further action by the list box. A return value of -1 indicates that the list box should perform the default action in response to the keystroke. A return value of 0 or greater specifies the index of an item in the list box and indicates that the list box should perform the default action for the keystroke on the given item.

Default Action

The DefWindowProc function returns -1.

See Also

DefWindowProc, WM_CHARTOITEM, WM_KEYDOWN 

See also:


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