killing popup from windows service

Question

I have a windows service which uses powerpoint interop to read powerpoint and write the output in an xml file. Now, if this service is given a password protected PPT to read, it hangs as service cannot handle popups. This popup is the popup to ask password of the PPT. I want to kill this popup, so that my service can throw atleast an error "cannot open PPT".

Any ideas?

savan gandhi · Answer

======================================================= _ Private Shared Function FindWindow(ByVal lpClassName As String, ByVal lpWindowName As String) As Integer End Function _ Private Shared Function GetWindowThreadProcessId(ByVal hwnd As IntPtr, _ ByRef lpdwProcessId As Integer) As Integer End Function 'Declare Function SendMessageHM Lib "user32.dll" Alias "SendMessageA" (ByVal hWnd As Int32, ByVal wMsg As Int32, ByVal wParam As Int32, ByVal lParam As String) As Integer _ Private Shared Function SendMessageHM(ByVal hWnd As Int32, ByVal wMsg As Int32, ByVal wParam As Int32, ByVal lParam As String) As Integer End Function ========================================================== Private Sub tmrPoll_Elapsed(ByVal obj As Object, ByVal e As ElapsedEventArgs) 'strKeywords = "Password,Microsoft PowerPoint, Microsoft Excel" -- title of the popup window that you want to kill Dim arr() As String = strKeywords.Split(",") Dim i As Integer For i = 0 To arr.Length - 1 Step 1 Dim hwnd As Integer = FindWindow(Nothing, arr(i)) If hwnd 0 Then Dim ProcessID As Integer Dim ProcessName As String GetWindowThreadProcessId(New System.IntPtr(hwnd), ProcessID) ''Check that the window belongs to excel or powerpoint ProcessName = System.Diagnostics.Process.GetProcessById(ProcessID).ProcessName If (ProcessName.ToUpper.Equals("EXCEL") Or ProcessName.ToUpper.Equals("POWERPNT")) Then SendMessageHM(hwnd, WM_SYSCOMMAND, SC_CLOSE, 0) End If End If Next End Sub ========================================================== This code works for killing popup from service. Prerequisite is that the service should have "allow service to interact with desktop" option as checked. I am not sure how to pass particular keys (like Alt+F4) with "SendMessageHM" function. Thanks...