如何使用 C# 关闭 OneNote 窗口？

Question

How to close a OneNote window opened when creating a new Page using C#?

I downloaded Matthias' GetOCR C# project (from: link ). However, when executing the GetOCR code the OneNote windows opens and is left open even once the method finishes executing.

I know that probably one way to close this windows is sending a WM_CLOSE using the WindowHandle below:

app.Windows.CurrentWindow

However, I would like to know if there is a "nicer" way (natively supported by OneNote API) of closing the OneNote window. I can't seem to find any guidance on the OneNote API pages ( link ).

Answer 1

This should work unless you aren't trying to terminate the process.

Process[] p = Process.GetProcessesByName("onenote");
p[0].Kill();

I'm not sure about the process name though.

Answer 2

I know that this is an old question, but I recently needed the ability to close the OneNote Win32 application as part of an office automation.

It is clearly possible to open a single section of a OneNote (one tab = a file with extension .one ) using OneNote interop:

string sectionID = String.Empty;
var oneNoteApp = new Microsoft.Office.Interop.OneNote.Application();
oneNoteApp.OpenHierarchy(inputFile, null, out sectionID, CreateFileType.cftNone);
oneNoteApp.SyncHierarcy(sectionID);
oneNoteApp.NavigateTo(sectionID);
oneNoteApp.Publish(sectionID, outputFile, PublishFormat.pfPDF);

However, closing the section is not possible, even when obtaining the ID of the notebook.

Sending WM_CLOSE to the windows handle of the oneNoteApp (as @pushpraj suggested) will work the first few times, but after the 2nd or 3rd close, OneNote will complain that the app was not close properly. The "kill" approach (as @DarkDragon suggested) will also lead to the same issue.

The following close method was the only workaround I was able to find. It solved my problem.

var hWnd = oneNoteApp.Windows.CurrentWindows.WindowsHandle;
var phWnd = GetParent((IntPtr) hWnd);
var gphWnd = GetParent((IntPtr) phWnd);
PostMessage((IntPtr) gphWnd, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);

(Where GetParent and PostMessage both are available in user32.dll .)