Hi Alexander Sabato!

Run this command into command prompt

rundll32.exe %WINDIR%\System32\mshtml.dll,PrintHTML "FilePath"

If you are using C#, than used line of code as below

using (Process printProcess = new Process())
{
    string systemPath = Environment.GetFolderPath(Environment.SpecialFolder.System);
    printProcess.StartInfo.FileName = systemPath + @"\rundll32.exe";
    printProcess.StartInfo.Arguments = systemPath + @"\mshtml.dll,PrintHTML """ + FilePath + @"""";
    printProcess.Start();
}

Note: Here "FilePath", represent path of document which you want to print.

I have tried with the above code but it will ask to Click the Print button through dialog box.

using (Process printProcess = new Process())
         {            
             string systemPath = Environment.GetFolderPath(Environment.SpecialFolder.System);
             printProcess.StartInfo.FileName = systemPath + @"\rundll32.exe";
             printProcess.StartInfo.Arguments = systemPath + @"\mshtml.dll,PrintHTML """ + document + @"""";
              
             printProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
             printProcess.Start();
        }