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TSF Reference
TSF Interfaces
ITfKeyEventSink
 ITfKeyEventSink::OnKeyDown
Text Services Framework
ITfKeyEventSink::OnKeyDown
The method is called when a key down event occurs.
HRESULT OnKeyDown(
  ITfContext* pic,
  WPARAM wParam,
  LPARAM lParam,
  BOOL* pfEaten );

Parameters

pic
[in] Pointer to the input context that receives the key event.
wParam
[in] Specifies the virtual-key code of the key. For more information about this parameter, see the wParam parameter in WM_KEYDOWN.
lParam
[in] Specifies the repeat count, scan code, extended-key flag, context code, previous key-state flag, and transition-state flag of the key. For more information about this parameter, see the lParam parameter in WM_KEYDOWN.
pfEaten
[out] Pointer to a BOOL that, on exit, indicates if the key event was handled. If this value receives TRUE, the key event was handled. If this value is FALSE, the key event was not handled.

Return Values

Returns a standard OLE-defined error code or one of the following:
Value Meaning
S_OK The method was successful.

Requirements

Windows NT/2000/XP: Included in Windows XP.
Redistributable: Requires TSF 1.0 on Windows NT 4.0; Windows 2000; and Windows 98/Me.
Header: Declared in Msctf.idl and Msctf.h.
Library: Included as a resource in Msctf.dll.

See Also

WM_KEYDOWN

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