afx_msg void OnKeyUp( UINT nChar, UINT nRepCnt, UINT nFlags );
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.
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.
WM_CHAR, WM_KEYUP, CWnd::Default, WM_KEYDOWN