[OptiPNG file type plugin (November 30, 2008)]

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.

[OptiPNG file type plugin (November 30, 2008)]

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")
                       }