CWnd::OnKeyUp

Syntax

afx_msg void OnKeyUp( UINT nChar, UINT nRepCnt, UINT nFlags );

Parameters

nChar

Specifies the virtual-key code of the given key.

nRepCnt

Repeat count (the number of times the keystroke is repeated as a result of the user holding down the key).

nFlags

Specifies the scan code, key-transition code, previous key state, and context code, as shown in the following list:

Value Description

0–7 Scan code (OEM-dependent value). Low byte of high-order word.
8 Extended key, such as a function key or a key on the numeric keypad (1 if it is an extended key; 0 otherwise).
9–10 Not used.
11–12 Used internally by Windows.
13 Context code (1 if the ALT key is held down while the key is pressed, 0 otherwise).
14 Previous key state (1 if the key is down before the call, 0 if the key is up).
15 Transition state (1 if the key is being released, 0 if the key is being pressed).

For a WM_KEYUP message, the key-transition bit (bit 15) is 1 and the context-code bit (bit 13) is 0.

Remarks

Called when a nonsystem key is released. A nonsystem key is a keyboard key that is pressed when the ALT key is not pressed, or a keyboard key that is pressed when the CWnd has the input focus.

For IBM Enhanced 101- and 102-key keyboards, enhanced keys are the right ALT and the right CONTROL keys on the main section of the keyboard; the INSERT, DELETE, HOME, END, PAGE UP, PAGE DOWN, and ARROW keys in the clusters to the left of the numeric keypad; and the slash (/) and ENTER keys in the numeric keypad. Some other keyboards may support the extended-key bit in nFlags.

This message-handler member function calls the Default member function. Override this member function in your derived class to handle the WM_KEYUP message.

See Also

WM_CHAR, WM_KEYUP, CWnd::Default, WM_KEYDOWN