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How to check if an MS Word is closed in C#

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Last Modified: 2016-09-23
Hello experts, I am doing an application in C# which open exe files like notepad, calculator.
So, my aim is when I open an exe file like Word, a button is created automatically
and then when I close the Word app, the button will be removed.
Each app will have its own button when it is launched.
I tried to do it but I have some issues with the closing of the app.
Here is what I did:
var applicationWord = new Microsoft.Office.Interop.Word.Application();


            applicationWord.Visible = true;
               applicationWord.DocumentBeforeClose += DocumentBeforeClose;



               if (applicationWord.Visible == true)
               {


                       button = new Button();
                       button.Image = Properties.Resources.word_80;
                       PIC_Barre.Controls.Add(button);
                       button.AutoSize = true;
                       //     button.Tag = proc.Id;
                       PIC_Barre.Controls.Add(button);


                   foreach (Process proc in Process.GetProcessesByName("WINWORD"))
                   {
                       if (proc.ProcessName.Contains("WINWORD"))
                       {
                           proc.WaitForInputIdle();
                           {
                               Thread.Sleep(500);
                               SetWindowPos(proc.MainWindowHandle.ToInt32(),
                                   (int)SetWinPos_ZOrderOpt.HWND_TOPMOST,
                                   0, 0, 0, 0,
                                   (int)(SetWinPosFlags.SWP_NOSIZE |
                                         SetWinPosFlags.SWP_NOMOVE));
                           }
                           button.Click += (s, e) => { ShowWindowAsync(proc.MainWindowHandle, (int)ShowWindowCommands.Normal); };
                           proc.Exited += (s, e) =>
                           {
                               var method = (Action)(() => PIC_Barre.Controls.Remove(button));
                               // button.Visible = false;
                               if (button.InvokeRequired)
                               {
                                   button.Invoke(method);
                               }


                           };

                       }

                   }
               }

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