I have an application that uses a TWAIN activex control. On one
particular scanner driver, I have the option to do a pre-scan. After
doing the pre-scan, my application receives focus again and looks like
it is hanging because the pre-scan window is still open waiting for me
to accept the scan. I can then simply click the prescan window in the
taskbar to open that window and accept the prescan.

I'm wondering if there is a way to look for a particular window that may
  have been opened by an activex control and give it focus, or look for
a the name of an application in the taskbar and give it focus... I guess
I just need some sort of hack. Anyone have any ideas?

Thanks,
Dustin

You can do this by querying the process list


hth

Michel Posseth [MCP]


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here some example code
( reusable class module i once wrote )
this one is showing msinfo and raises an event when it is closed
documented in dutch but it is pretty simple to understand and it shows what
i mean



Imports System.Diagnostics
Imports Microsoft.Win32
Imports System.Threading
Namespace MPSoft
    Public Class clsMsInfo
        Private Function exeFile() As String
            exeFile = String.Empty
            Try
                ' haal het pad naar  MSINFO32.EXE uit het register
                Dim key As RegistryKey
                key = Registry.LocalMachine.OpenSubKey( _
                    "SOFTWARE\Microsoft\Shared Tools\MSInfo")
                If key Is Nothing Then
                    Throw New Exception("Registry key not found")
                End If
                exeFile = key.GetValue("Path", "").ToString()
                key.Close()
            Finally
                If String.IsNullOrEmpty(exeFile) OrElse Not
My.Computer.FileSystem.FileExists(exeFile) Then
                    'blijkbaar hebben we geen registry access , of de
waardes aldaar zijn corrupt
                    'we hopen dus maar dat de environment variabelen dit
probleem voor ons oplossen
                    exeFile = "msinfo32.exe"
                End If
            End Try
        End Function
        Public Event MsInfoClosed()
        ''' <summary>
        ''' Starts the ms  system info dialog and raises an event when closed
        ''' the prefered start method for this sub is asynchronous ( asynch
delegate )
        ''' </summary>
        Public Sub StartMsInfo()
            'start het process
            Dim proc As Process = Process.Start(exeFile)

            Thread.Sleep(2000) ' pauseer de thread zodat we zeker weten dat
de proces lijst is geupdated 

            Dim closed As Boolean  'wanneer true dan is de system
information dialog afgesloten 

            Do Until closed
                Thread.Sleep(5)
                Dim ref As Boolean
                For Each proc In Process.GetProcesses 'loop door de proces
lijst
                    If proc.ProcessName.Trim = "HelpCtr" Then
                        ref = True 'gevonden dus weg hier en  check opnieuw
                        Exit For
                    End If
                    ref = False
                Next
                closed = Not ref
            Loop
            'laat weten dat de info dialog is afgesloten
            RaiseEvent MsInfoClosed()


        End Sub
        Public Event MsinfoRapportCreated(ByVal ReportLocation As String)
        ''' <summary>
        ''' Maakt een MS info rapport van het gehele systeem
        ''' </summary>
        ''' <param name="outfile">file path voor rapport </param>
        Public Sub MsInforapport(Optional ByVal outfile As String =
"c:\Temp\Report.txt")
            Try
                Dim proc As Process = Process.Start(exeFile, "/report " &
outfile)
                ' wacht to het proces klaar is  (dit kan even duren )
                proc.WaitForExit()
                RaiseEvent MsinfoRapportCreated(outfile)
            Catch ex As Exception
                'doe niets
            End Try
        End Sub
    End Class
End Namespace





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