BOOL WINAPI ImeSetCompositionString(HIMC hIMC, DWORD dwIndex,
LPCVOID lpComp, DWORD dwCompLen, LPCVOID lpRead, DWORD dwReadLen);
Causes the IME to arrange the composition string structure with the given data. This function causes the IME to send the WM_IME_COMPOSITION message.
· If successful, the return value is TRUE. Otherwise, it is FALSE.
SCS_SETSTR
SCS_CHANGEATTR
SCS_CHANGECLAUSE