IActiveIME Interface
function ToAsciiEx(uVirKey: SYSUINT; uScanCode: SYSUINT; var pbKeyState: Byte; fuState: SYSUINT; hIMC: LongWord; out pdwTransBuf: LongWord; out puSize: SYSUINT): HResult; stdcall;
This is ToAsciiEx, a member of class IActiveIME.