Excel Process not closing in VB.net

Question

I am creating an excel file using interop.excel and the process is not closing. This is the code i am trying to use.

 Private Sub converToExcel(fileLoc As S         


        

Answer 1

'Get the PID from the wHnd and kill the process.
' open the spreadsheet
ImportFileName = OpenFileDialog1.FileName
excel = New Microsoft.Office.Interop.Excel.ApplicationClass
wBook = excel.Workbooks.Open(ImportFileName)
hWnd = excel.Hwnd
Dim id As Integer = GetWindowThreadProcessId(hWnd, ExcelPID)

---

Sub CloseExcelFile()
        Try
            ' first try this
            wBook.Saved = True
            wBook.Close()
            excel.Quit()

            ' then this.
            System.Runtime.InteropServices.Marshal.ReleaseComObject(excel)
            excel = Nothing

            ' This appears to be the only way to close excel!
            Dim oProcess As Process
            oProcess = Process.GetProcessById(ExcelPID)
            If oProcess IsNot Nothing Then
                oProcess.Kill()
            End If

        Catch ex As Exception
            excel = Nothing
        Finally
            GC.Collect()
        End Try
    End Sub