Hello Ed White,

Thanks for using Microsoft Newsgroup Support Service, my name is Ji Zhou
[MSFT] and I will be working on this issue with you.

First, I want to ensure I understand the issue correctly. From the
description, it is a VSTO Excel project. The objective is calling VSTO
codes, but does not make the Excel enter into edit mode, when end user
double clicks a cell in the Excel sheet. If I misunderstood your issue,
please feel free to let me know.

If I have understood, then I think we can subscribe this.Application.
SheetBeforeDoubleClick event and, put our codes in the event handle
function. The event handle function has a parameter declared as "ref bool
Cancel". After we set the "Cancel" parameter to true, the default behavior
of Excel will be canceled. That is to say, double clicking will not make
the cell enter into edit mode.

I tested the following codes on my side, and it worked. If you have any
future questions or concerns, please feel free to let me know.
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
this.Application.SheetBeforeDoubleClick += new
Microsoft.Office.Interop.Excel.AppEvents_SheetBefo reDoubleClickEventHandler(
Application_SheetBeforeDoubleClick);
}

void Application_SheetBeforeDoubleClick(object Sh,
Microsoft.Office.Interop.Excel.Range Target, ref bool Cancel)
{
Cancel = true;
MessageBox.Show("Double click");
}


Best regards,
Ji Zhou , remove ‘online.’)
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