rc (BOOL) - returns

      Return codes.

      TRUE

        Successful completion.
      FALSE
        Error occurred.

        Possible returns from WinGetLastError: PMERR_INVALID_PARAMETERS (0x1208)

          An invalid parameter was specified.
        PMERR_INVALID_BUFFER_SIZE (0x110A)
          An invalid buffer size was specified.
        PMERR_INVALID_HWND (0x1101)
          An invalid window handle was specified.
        PMERR_FUNCTION_NOT_SUPPORTED (0x1641)
          This function is not supported.

        [Back: WinIMControlMode Parameter - pIMControl]
        [Next: WinIMControlMode - Parameters]