WM_IME_STARTCOMPOSITION

The WM_IME_STARTCOMPOSITION message is sent immediately before the IME generates the composition string as a result of a keystroke. The message is a notification to an IME window to open its composition window. An application should process this message if it displays composition characters itself.

A window receives this message through its WindowProc function.

LRESULT CALLBACK WindowProc(
  HWND hwnd,       // handle to window
  UINT uMsg,       // WM_IME_STARTCOMPOSITION
  WPARAM wParam,   // not used
  LPARAM lParam    // not used
);

Parameter

This message has no parameters.

Return Values

This message has no return value.

Remarks

If an application has created an IME window, it should pass the WM_IME_STARTCOMPOSITION message to that window. The DefWindowProc function processes this message by passing it to the default IME window.

Requirements

  Windows NT/2000: Requires Windows NT 4.0 or later.
  Windows 95/98: Requires Windows 95 or later.
  Header: Declared in Imm.h.

See Also

Input Method Editor Overview, Input Method Editor Messages, DefWindowProc