private static extern void cmsDoTransform( cmsHTransform hTransform, IntPtr InputBuffer, IntPtr OutputBuffer, cmsUInt32Number Size);
private static extern cmsHTransform cmsCreateTransform( cmsHProfile Input, cmsUInt32Number InputFormat, cmsHProfile Output, cmsUInt32Number OutputFormat, cmsUInt32Number Intent, cmsUInt32Number dwFlags);