Microsoft Foundation Classes (mfc.hlp) (Table of Contents; Topic list)
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CWnd::OnSysChar
CWnd                                        Up Contents Index Back
──Microsoft Foundation Classes──────────────────────────────────────────────
 
  afx_msg void OnSysChar( UINT  nChar, UINT  nRepCnt, UINT  nFlags  );
 
  Parameter   Description
 
  <nChar>     Specifies the ASCII-character key code of a Control-menu
              key.
 
  <nRepCnt>   Specifies the repeat count (the number of times the
              keystroke is repeated as a result of the user holding down
              the key).
 
  <nFlags>    The <nFlags> parameter can have these values:
 
              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
                      message is sent, 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 if CWnd has the input focus and the WM_SYSKEYUP or
  WM_SYSKEYDOWN message is received. It specifies the virtual-key code
  of the Control-menu key.
 
  When the context code is 0, WM_SYSCHAR can pass the WM_SYSCHAR message
  to the TranslateAccelerator Windows function, which will handle it as
  though it were a normal key message instead of a system-key message.
  This allows accelerator keys to be used with the active window even if
  the active window does not have 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_SYSCHAR message.
 
  See Also
 
  ::TranslateAccelerator, WM_SYSKEYDOWN, WM_SYSKEYUP,
  CWnd::Default, WM_SYSCHAR
 
 
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