CWnd::OnKeyUp

Статья
10/16/2008

The framework calls this member function when a nonsystem key is released.

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

Параметры

nChar
Specifies the virtual key code of the given key. For a list of of standard virtual key codes, see Winuser.h
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; otherwise 0).
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; otherwise 0).
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.

Заметки

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 CTRL keys on the main section of the keyboard; the INS, DEL, 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.

Примечание.
This member function is called by the framework to allow your application to handle a Windows message. The parameters passed to your function reflect the parameters received by the framework when the message was received. If you call the base-class implementation of this function, that implementation will use the parameters originally passed with the message and not the parameters you supply to the function.

This member function is called by the framework to allow your application to handle a Windows message. The parameters passed to your function reflect the parameters received by the framework when the message was received. If you call the base-class implementation of this function, that implementation will use the parameters originally passed with the message and not the parameters you supply to the function.