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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| -
| Header File
| winuser.h
| Unicode
| No
| Platform Notes
| None
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WM_CHARTOITEM
The WM_CHARTOITEM message is sent by a list box with the LBS_WANTKEYBOARDINPUT
style to its owner in response to a WM_CHAR message.
WM_CHARTOITEM
nKey = LOWORD(wParam); // key value
nCaretPos = HIWORD(wParam); // caret position
hwndListBox = (HWND) lParam; // handle of list box
Parameters
nKey
Value of the low-order word of wParam. Specifies the value of the key the user pressed.
nCaretPos
Value of the high-order word of wParam. Specifies the current position of the caret.
hwndListBox
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  1 or 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 0 or greater
specifies the zero-based 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.
Remarks
Only owner-drawn list boxes that do not have the LBS_HASSTRINGS style can
receive this message.
See Also
DefWindowProc, WM_CHAR, WM_VKEYTOITEM
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