Microsoft Foundation Classes (mfc.hlp) (Table of Contents; Topic list)
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CWnd::OnDeadChar
CWnd                                        Up Contents Index Back
──Microsoft Foundation Classes──────────────────────────────────────────────
 
  afx_msg void OnDeadChar( UINT  nChar, UINT  nRepCnt, UINT  nFlags  );
 
  Parameter   Description
 
  <nChar>     Specifies the dead-key character value.
 
  <nRepCnt>   Specifies the repeat count.
 
  <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).
 
  Remarks
 
  Called when the OnKeyUp member function and the OnKeyDown member
  functions are called. This member function can be used to specify the
  character value of a dead key. A dead key is a key, such as the umlaut
  (double-dot) character, that is combined with other characters to form a
  composite character. For example, the umlaut-O character consists of the
  dead key, umlaut, and the O key.
 
  An application typically uses OnDeadChar to give the user feedback about
  each key pressed. For example, an application can display the accent in
  the current character position without moving the caret.
 
  Since there is not necessarily a one-to-one correspondence between keys
  pressed and OnDeadChar calls, the information in <nFlags> is generally
  not useful to applications. The information in <nFlags> applies only to
  the most recent call to the OnKeyUp member function or the
  OnKeyDown member function that precedes the OnDeadChar call.
 
  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
  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>.
 
  This message-handler member function calls the Default member
  function. Override this member function in your derived class to handle
  the WM_DEADCHAR message.
 
  See Also
 
  CWnd::Default, WM_DEADCHAR
 
 
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