An application sends the IMC_GETCONVERSIONMODE message to an IME window to obtain the current conversion mode. The window retrieves the current conversion mode from the current input context.
msg = (UINT) WM_IME_CONTROL;
wParam = (WPARAM) IMC_GETCONVERSIONMODE;
lParam = 0;
Return Values
Returns a combination of the values given in the "IME Conversion Modes" table in Input Method Editor Constants.