I want to integrate an “.exe” program in my application but I don’t know how to do that!

One approach you could look at is to use the System.Diagnostics.Process class to call the .exe and redirect the output so that it is captured by your C# program.

Here's some basic code to do this:

         Process proc  = new Process();
         proc.StartInfo.FileName  = "whatever.exe";
         proc.StartInfo.Arguments = "password";
         proc.StartInfo.UseShellExecute = false;
         proc.StartInfo.RedirectStandardOutput = true;
         proc.Start();
         List lines = new List();
         string line;

         // read and store lines from redirected standard output
         while ((line = proc.StandardOutput.ReadLine()) != null)
         {
             lines.Add(line);
         }

         proc.WaitForExit();

         // process  output