antond

P.S.: the best way to find a path to the “optipng.exe” executable is to find a path to currentAssembly. Besause on my work machine I have no access to HKLM registry, so no path is stored there, and sometimes current directory is changed. Also, I recomment to use string.Format method to create an argument string. To sum up, lines 90-107 of OptiPngFileType.cs should be changed from if (token.Optimize) { Process optimize = new Process { StartInfo = { Arguments = "\"" + tempFile + "\"" + " -o" + token.Compression + " -i" + (token.Interlace ? "1" : "0"), WindowStyle = ProcessWindowStyle.Minimized } }; string startDir; try { startDir = (string)Registry.LocalMachine.OpenSubKey("SOFTWARE").OpenSubKey("Paint.NET").GetValue("TARGETDIR"); } catch (NullReferenceException) { startDir = Environment.CurrentDirectory; } optimize.StartInfo.FileName = Path.Combine(Path.Combine(startDir, "FileTypes"), "optipng.exe"); optimize.Start(); optimize.WaitForExit(); optimize.Dispose(); } to if (token.Optimize) { Process optimize = new Process { StartInfo = { UseShellExecute = false, CreateNoWindow = true, Arguments = string.Format("\"{0}\" -o{1} -i{2}", tempFile, token.Compression, token.Interlace ? "1" : "0") } }; string startDir = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location); optimize.StartInfo.FileName = Path.Combine(startDir, "optipng.exe"); optimize.Start(); optimize.WaitForExit(); optimize.Dispose(); } btw, reference to Microsoft.Win32 can be thrown away now.

I want ot submit a patch. To get rid of annoying window, appearing each time you change some settings, or saving file, change lines 92—95 of OptiPngFileType.cs from StartInfo = { Arguments = "\"" + tempFile + "\"" + " -o" + token.Compression + " -i" + (token.Interlace ? "1" : "0"), WindowStyle = ProcessWindowStyle.Minimized } to StartInfo = { UseShellExecute = false, CreateNoWindow = true, Arguments = "\"" + tempFile + "\"" + " -o" + token.Compression + " -i" + (token.Interlace ? "1" : "0") }