WM_SYSDEADCHAR (Compact 2013)

3/28/2014

This message is sent to the window with the keyboard focus when a WM_SYSKEYDOWN message is translated by the TranslateMessage function. WM_SYSDEADCHAR specifies the character code of a system dead key - that is, a dead key that is pressed while holding down the ALT key.

Syntax

WM_SYSDEADCHAR chCharCode = (TCHAR) wParam; 
    lKeyData = lParam;

Parameters

• chCharCode
  Specifies the character code generated by the system dead key - that is, a dead key that is pressed while holding down the ALT key.

• lKeyData
  Specifies the repeat count, context code, previous key-state flag, and transition-state flag, as shown in the following table.

  Value	Description
  0-15	Specifies the repeat count. The value is the number of times the keystroke is repeated as a result of the user holding down the key.
  29	Specifies the context code. The value is 1 if the ALT key is held down while the key is pressed; otherwise, the value is 0.
  30	Specifies the previous key state. The value is 1 if the key is down before the message is sent, or it is 0 if the key is up.
  31	Specifies the transition state. The value is 1 if the key is being released, or it is 0 if the key is being pressed.

Return Value

An application should return zero if it processes this message.

Remarks

For enhanced 101- and 102-key keyboards, extended keys are the right ALT and 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 divide (/) and ENTER keys in the numeric keypad. Other keyboards may support the extended-key bit in the lKeyData parameter.

Requirements

See Also

Reference

Keyboard Messages
TranslateMessage
WM_SYSKEYDOWN