I tried several things, e.g. enumerate all running processes, enumerate all windows by the WPF application, but no luck. This is what finally helped:
#region Force Scan Progress to front hack
[DllImport("user32.dll", EntryPoint = "EnumDesktopWindows", ExactSpelling = false, CharSet = CharSet.Auto, SetLastError = true)]
private static extern bool EnumDesktopWindows(IntPtr hDesktop, EnumDelegate lpEnumCallbackFunction, IntPtr lParam);
[DllImport("user32.dll", EntryPoint = "GetWindowText", ExactSpelling = false, CharSet = CharSet.Auto, SetLastError = true)]
private static extern int _GetWindowText(IntPtr hWnd, StringBuilder lpWindowText, int nMaxCount);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool IsWindowVisible(IntPtr hWnd);
[DllImport("user32.dll")]
public static extern int SetForegroundWindow(IntPtr hWnd);
const int MAXTITLE = 255;
private delegate bool EnumDelegate(IntPtr hWnd, int lParam);
public static string GetWindowText(IntPtr hWnd)
{
StringBuilder strbTitle = new StringBuilder(MAXTITLE);
int nLength = _GetWindowText(hWnd, strbTitle, strbTitle.Capacity + 1);
strbTitle.Length = nLength;
return strbTitle.ToString();
}
private static bool EnumWindowsProc(IntPtr hWnd, int lParam)
{
string strTitle = GetWindowText(hWnd);
if (strTitle.StartsWith("Title of progress bar")) SetForegroundWindow(hWnd);
return true;
}
private void forceScanProgressToFront(object source, EventArgs ea)
{
EnumDelegate delEnumfunc = new EnumDelegate(EnumWindowsProc);
bool bSuccessful = EnumDesktopWindows(IntPtr.Zero, delEnumfunc, IntPtr.Zero);
if (!bSuccessful)
{
// Get the last Win32 error code
int nErrorCode = Marshal.GetLastWin32Error();
string strErrMsg = String.Format("EnumDesktopWindows failed with code {0}.", nErrorCode);
throw new Exception(strErrMsg);
}
}
#endregion
I bind this to a DispatcherTimer
which fires every 500ms. So even if the user tries to hide the progress bar it pops up every 500ms.
See also: http://hintdesk.com/how-to-enumerate-all-opened-windows/