hwndFrame (HWND) - input

      Frame window handle to be processed. (NULL indicates a focused window.)

    pIMControl (PIMCONTROL) - input

      Pointer to the IMCONTROL structure.

    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 Return Value - rc]
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