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This message is sent to the window with the keyboard focus when a WM_SYSKEYDOWNmessage is translated by the TranslateMessagefunction. 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.
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 Values
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 lKeyDataparameter.
Requirements
Runs on Versions Defined in Include Link to Windows CE OS 1.0 and later Winuser.h Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.
See Also
TranslateMessage, WM_SYSKEYDOWN