Adding a Custom Task Pane to Word (Without using VSTO)

Adding a Custom Task Pane to Word (Without using VSTO)

By : Camille Pigenel
Date : November 22 2020, 12:01 PM
it fixes the issue As always I spend 3 hours googleing something, ask a question and then find the answer 30 mins later myself!
This was invaluable in getting it sorted http://www.shulerent.com/2011/01/23/adding-task-panes-in-a-office-add-in-when-using-idtextensibility2/
code :
public class WordApplication : Extensibility.IDTExtensibility2
    private Microsoft.Office.Interop.Word.Application WordApp;
    private ICTPFactory myCtpFactory;
    private CustomTaskPane myPane;
    private tskPane myControl; //My UserControl

    public void OnConnection(object Application, Extensibility.ext_ConnectMode ConnectMode, object AddInInst, ref Array custom)
        WordApp = Application as Microsoft.Office.Interop.Word.Application;
        WordApp.DocumentOpen += new Word.ApplicationEvents4_DocumentOpenEventHandler(WordApp_DocumentOpen);

    public void CTPFactoryAvailable(ICTPFactory CTPFactoryInst)
        myCtpFactory = CTPFactoryInst;

    void WordApp_DocumentOpen(Word.Document Doc)
        if (isPaneRequired(Doc)) ShowSomeSortOfPane();

    private bool isPaneRequired(Word.Document Doc) { return true; } //Lots of code not needed for example.

    private void ShowSomeSortOfPane()
        myPane = myCtpFactory.CreateCTP("NameSpace.UserControlClassName", "My Task Pane", Type.Missing);
        myPane.DockPosition = Microsoft.Office.Core.MsoCTPDockPosition.msoCTPDockPositionRight;
        myControl = (tskPane)myPane.ContentControl;

        myControl.CustomProperty = CustomValue;
        myPane.Visible = true;


    public void OnDisconnection(Extensibility.ext_DisconnectMode RemoveMode, ref Array custom) { }
    public void OnStartupComplete(ref Array custom) { }
    public void OnAddInsUpdate(ref Array custom) { }
    public void OnBeginShutdown(ref Array custom) { }

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Drag-and-drop to custom task pane in Excel VSTO

Drag-and-drop to custom task pane in Excel VSTO

By : user2959056
Date : March 29 2020, 07:55 AM
this will help Ok, I found a way. It turns out the DragDrop event won't fire as Excel handles all drag events itself, but the DragEnter event does fire, and when it does I can open a modeless form on top of the actual drop target. This form can then receive the DragDrop event (and kills itself on the DragLeave event). It's a bit of a hack, but it seems to be working nicely.
VSTO override Excel hotkeys inside custom task pane

VSTO override Excel hotkeys inside custom task pane

By : user3070222
Date : March 29 2020, 07:55 AM
I wish this helpful for you You can use the SetWindowsHookEx function from Windows API to set up a keyboard hook. But overriding the built-in keyboard shortcut is not a good idea. Anyway, you can read more about this and find a sample code in the Using shortcut keys to call a function in an Office Add-in article.
HTML content in Custom Task Pane Outlook VSTO ADD in

HTML content in Custom Task Pane Outlook VSTO ADD in

By : GrandMaster
Date : March 29 2020, 07:55 AM
I hope this helps . Sure, add a web browser control to your task pane and you can display any HTML content.
How do I replace a custom task pane in Outlook (VSTO)?

How do I replace a custom task pane in Outlook (VSTO)?

By : Houjun Zhang
Date : March 29 2020, 07:55 AM
Hope that helps You need to keep a dictionary where the key will be an inspector object. So, that you can get access to the custom task pane easily.
code :
       InspectorWrapper inspectorWrapper = Globals.ThisAddIn.InspectorWrappers[inspector];
        CustomTaskPane taskPane = inspectorWrapper.CustomTaskPane;
        if (taskPane != null)
            taskPane.Visible = false;
VSTO-Custom Task Pane how to get current MailItem

VSTO-Custom Task Pane how to get current MailItem

By : Michael Monnerie
Date : March 29 2020, 07:55 AM
it should still fix some issue I want find some way to let custom task pane get current inspector. what method should I use? , John Hart@GitHub answered my question. Here is his code below:
code :
private void Button1_Click(object sender, EventArgs e)
        Inspector inspector = Globals.ThisAddIn.Application.ActiveInspector();
        MailItem mailItem = inspector.CurrentItem as MailItem;
        mailItem.Subject = "test for button";
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