Default email client window cannot go to front in Windows Vista Business 64bit

• Monday, July 12, 2010 7:39 AM

   

   
  

  0

  I've developed a small C# application that will launch the default email client window by calling MAPISendMail API. I am facing a problem that the new launched email client window does not become in-front of other window but it's taskbar becomes flashing in orange colour for few time to alert user only. This situation happens in Windows Vista Business 64bit, I found that it works fine as expected, it becomes in-front of other window when i test it in Windows XP, Windows Vista 32bit, and Windows 7 64bit.

  When i set the ForegroundLockTimeout from 200000 to  0 of registry then restart the PC, I found that the default email client window (Microsoft Outlook) does become in-front of my application window. In addition, i tried with following way to launch the default email client window but it still did not become in-front of other window in Windows Vista Business 64bit. The SetForegroundWindow Windows APIs look like does not work in Windows Vista and above because security enhancement.

  Code:

  StringBuilder MsgBuilder = new System.Text.StringBuilder();
        MsgBuilder.Append("mailto:davidwoo1983@yahoo.com");
        MsgBuilder.Append("&cc=testcc@testcc.com,testcc1@testcc.com");
        MsgBuilder.Append("&bcc=testcc@testbcc.com,testcc1@testbcc.com");
        MsgBuilder.Append("&subject=this is test subject");
        MsgBuilder.Append("&body=this is test body");
        MsgBuilder.Append("&Attach=\"c:\\mailattach.txt\"");
  
        Process myProcess = new Process();
        myProcess.StartInfo.FileName = MsgBuilder.ToString();
        myProcess.StartInfo.UseShellExecute = true;
        myProcess.StartInfo.RedirectStandardOutput = false;
        myProcess.Start();
        SetForegroundWindow(myProcess.Handle);
        myProcess.Dispose();
  

  It is great if someone help to give advice and answer my doubts:

  1. The default email client window can become in-front of other window in Windows Vista 32bit but not in Windows Vista 64bit, Is it a normal behaviour?
  2. Without changing the default configuration of registry setting of Windows (ForegroundLockTimeout ), how can i make the default email client window becomes in-front of other window (IE window, window explorer, etc which do not set to TopMost)?

  Basic Information about the computer:
  Window Vista Business SP1, Intel(R) Core(TM) 2 Quad CPU Q8200 @ 2.33GHz, 4GB, 64-bit OS.

  Related Information:

  http://www.eggheadcafe.com/software/aspnet/31724323/bring-window-from-elevate.aspx
  http://msdn.microsoft.com/en-us/library/Aa480152.aspx#appcomp_topic12
  http://pcsupport.about.com/od/windowsxp/ht/stealingfocus02.htm
  http://msdn.microsoft.com/en-us/library/aa511446.aspx#buttons
  http://www.codeproject.com/KB/dotnet/Default_mail_client.aspx?msg=1676515#xx1676515xx
  http://stackoverflow.com/questions/1737664/how-to-open-program-through-c-program-and-give-this-program-focus
   

  • Moved by Helen Zhou Tuesday, July 13, 2010 2:56 AM (From:Windows Forms General)
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