[RESOLVED] instance of excel still in taskmanager

*EDIT*
nevermind i found a way to kill the instance that i don't want and to ensure that any other would be killed after the method finishes. I added the following see code...


ok hopefully someone can explain to me why the following is happening

first here's the code that i have, that i just started just want to make sure everything work the way it should for starters...

VB Code:

'Added Code
    '*********************************************************************************
    <DllImport("user32")> _
    Private Shared Function SendMessage(ByVal hwnd As Integer, ByVal msg As Integer, _
        ByVal wParam As Integer, ByVal lParam As Integer) As IntPtr
 
    End Function
    Private Const WM_DESTORY As Integer = &H2
    '*********************************************************************************
    Private Sub SaveToExcelFormat(ByVal filename As String, ByVal ds As DataSet)
        Dim XlsApp As New Excel.Application
        XlsApp.Visible = False
 
        XlsApp.DisplayAlerts = False
        Try
            Dim XlsWorkBook As Excel.Workbook = XlsApp.Workbooks.Add
 
            Try
                Dim XlsWorkSheet As Excel.Worksheet = CType(XlsWorkBook.Worksheets(1), Excel.Worksheet)
 
            Catch exSheet As Exception
                MsgBox(exSheet.ToString)
            End Try
            XlsWorkBook.SaveAs(filename.Substring(0, filename.LastIndexOf(".")))
            XlsWorkBook.Close()
        Catch exBook As Exception
            MsgBox(exBook.ToString)
        End Try
 
        If Not XlsApp Is Nothing Then
            XlsApp.Quit()
            'Added Code
            '************************************
            SendMessage(XlsApp.Hwnd, WM_DESTORY, 0, 0)
            '************************************
            XlsApp = Nothing
        End If
        GC.Collect()
    End Sub

ok here's the issue, if you would call it that, that i'm running into. my app is a mdi i have two child windows open in it... i do a save as set it to excel and it running the method. now i have task manager open because i wanted to make sure that excel was starting up and shutting down. the first time i do the save as excel starts but does not shut down, if i do it again it starts and shuts down. i see the first instance in TM'er and it's still sitting there i see the other pop up in there and then go away. so my question is why is it that the first one stays and any other instance will actually quit??? :confused:

Resolved??

Then what was the solution.
I would like to know that too!!

Richard(newbie)

Its not quitting because of the two resources left instanciated - XlsWorkSheet XlsWorkbook. They need to be destroyed so the resources can be free'd before Excel can close.

@Richnl, see his remarks about the added api code ;) "'Added Code"