Enable/Disable CLEARTYPE

Question

I'm using the following code to try to force enable CLEARTYPE option in user32.dll but don't work in representation of image from report text.

    [DllImport("user32.dll", SetLastError = true)]
            [return: MarshalAs(UnmanagedType.Bool)]
            static extern bool SystemParametersInfo(
                uint uiAction,
                uint uiParam,
                bool pvParam,
                uint fWinIni
            );

            const uint SPI_SETCLEARTYPE = 0x1049;
            const uint SPIF_UPDATEINIFILE = 0x01;
            const uint SPIF_SENDWININICHANGE = 0x02;

SystemParametersInfo(SPI_SETCLEARTYPE, 0, true, SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);

any advice?