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POExcel 2007 VSTO plugin exception when setting Font.Color
 

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    <p>I am working on an Excel 2007 VSTO plugin that is throwing COM exceptions on the client but not when debugging on my development machine. </p> <p>What the plugin does is capture Excel's Startup event, define a specialized style, then add an event handler to the SheetChange event. Anytime a value is changed in the sheet, the cell is set to the new style. All of this is to provide users a way to see the cells they've changed. Code is as follows:</p> <pre><code>private void ThisWorkbook_Startup(object sender, System.EventArgs e) { this.BeforeSave += new Microsoft.Office.Interop.Excel.WorkbookEvents_BeforeSaveEventHandler(ThisWorkbook_BeforeSave); this.SheetChange += new Microsoft.Office.Interop.Excel.WorkbookEvents_SheetChangeEventHandler(ThisWorkbook_SheetChange); cfStyle = Globals.ThisWorkbook.Styles.Add("CFStyle", missing); cfStyle.Font.Color = Excel.XlRgbColor.rgbOrange; cfStyle.Font.Bold = true; cfStyle.Interior.Color = Excel.XlRgbColor.rgbLightGray; cfStyle.Interior.TintAndShade = 0.8; cfStyle.Borders.LineStyle = Excel.XlLineStyle.xlContinuous; cfStyle.Borders.Weight = Excel.XlBorderWeight.xlThin; cfStyle.Borders.Color = Excel.XlRgbColor.rgbDarkSlateGray; cfStyle.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlDiagonalDown].LineStyle = Excel.XlLineStyle.xlLineStyleNone; cfStyle.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlDiagonalUp].LineStyle = Excel.XlLineStyle.xlLineStyleNone; } </code></pre> <p>When this runs in dev, it runs perfectly. However when it's run on a client machine, I get this exception detail once the VSTO plugin loads. The interesting part is it seems to fail on the first COM interaction, which happens to be setting a Style.Font.Color property.</p> <p>Here are the exception details:</p> <blockquote> <p>System.Runtime.InteropServices.COMException (0x800A03EC): Exception from HRESULT: 0x800A03EC</p> <p>Server stack trace:</p> <p>Exception rethrown at [0]:</p> <p>at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)</p> <p>at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData&amp; msgData, Int32 type)</p> <p>at Microsoft.Office.Interop.Excel.Font.set_Color(Object )</p> <p>at TriQuint.DemandPlanning.Workbook.ThisWorkbook.ThisWorkbook_Startup(Object sender, EventArgs e)</p> <p>at Microsoft.Office.Tools.Excel.Workbook.OnStartup()</p> <p>at TriQuint.DemandPlanning.Workbook.ThisWorkbook.FinishInitialization()</p> <p>at Microsoft.VisualStudio.Tools.Office.EntryPointComponentBase.Microsoft.VisualStudio.Tools.Applications.Runtime.IEntryPoint.FinishInitialization()</p> <p>at Microsoft.VisualStudio.Tools.Applications.AddInAdapter.ExecutePhase(ExecutionPhases executionPhases)</p> <p>at Microsoft.VisualStudio.Tools.Applications.AddInAdapter.CompleteInitialization()</p> <p>at Microsoft.VisualStudio.Tools.Office.Internal.OfficeAddInAdapterBase.ExecuteEntryPointsHelper()</p> </blockquote> <p>Has anyone ever seen anything like this? I've done quite a few validations, such as ensuring the proper versions of .NET, VSTO Interop, Excel 2007, etc etc.</p> <p>Thanks in advance for any advice! Jim</p>
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