Question : How To Run an Excel Application from VB.Net

Hello

I have a small EXCEL application that I run from a VB.Net program using SHELL.

When Excel loads, it automatically runs a Macro that OUTPUTS to a file.

The Macro then tells Excel to Quit itself.

It seems to work - because it OUTPUTS to the file correctly.

The problem is that I keep getting a Vista Message Box telling me that "Microsoft Excel Has Stopped Working" and it then starts to 'search' for the cause of the problem - eventually telling me that the Excel program has to close.

But the EXCEL program did work.

So, how can I stop this Vista Message Box from appearing?

Thank you.

Answer : How To Run an Excel Application from VB.Net

I wrote the following code for another problem, i have taken out the unnecessary stuff, I believe this is a much better way to approach opening the said workbook, then closing it, then quitting excel

notice the private function at the bottom, also this assumes you will add a reference to excel in the project and also use Imports Excel = microsoft.blah.blah.blha

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Dim excelApp As Excel.Application
        Dim WB As Excel.Workbook
        Dim workbookName As String = "Test Workbook Name"

        'open Excel to minimized state
        excelApp = New Excel.Application()
        excelApp.Visible = CBool(Microsoft.Office.Core.MsoTriState.msoTrue)
        excelApp.WindowState = Excel.XlWindowState.xlMinimized

        'open workbook
        WB = excelApp.Workbooks.Open(workbookName, Microsoft.Office.Core.MsoTriState.msoFalse, _
                                     Microsoft.Office.Core.MsoTriState.msoFalse, _
                                     Microsoft.Office.Core.MsoTriState.msoTrue)
	
	WB.close
	excelApp.quit

        'need to release these com objects or they may remain open in the running services
        ReleaseObject(excelApp)
        ReleaseObject(WB)
        ReleaseObject(WS)
        ReleaseObject(target)

        excelApp = Nothing
        WB = Nothing
        WS = Nothing
        target = Nothing
        'Erase targetArray

        'run garbage collector
        GC.Collect()

    Private Sub ReleaseObject(ByVal o As Object)
        Try
            System.Runtime.InteropServices.Marshal.ReleaseComObject(o)
        Catch ex As Exception
        Finally
            o = Nothing
        End Try

    End Sub