/// <summary>
/// Starts a process and blocks until the Main Windows has loaded
/// returns the MainWindow's AutomationElement as an out parameter
/// </summary>
public static Process StartProcess(ProcessStartInfo startInfo, out AutomationElement rootElement)
{
AutomationDelegate getRoot = p =>
{
return(AutomationElement.FromHandle(p.MainWindowHandle));
};
return(StartProcess(startInfo, getRoot, out rootElement));
}
internal static Process StartProcess(ProcessStartInfo startInfo, AutomationDelegate onProcessWindowOpened, out AutomationElement rootElement)
{
Process process = null;
AutomationElement element = null;
if (onProcessWindowOpened != null)
{
AutomationEventHandler onWindowOpenedHandler = null;
onWindowOpenedHandler = (sender, e) =>
{
if (process != null)
{
if (process.MainWindowHandle != IntPtr.Zero)
{
Automation.RemoveAutomationEventHandler
(
WindowPatternIdentifiers.WindowOpenedEvent,
AutomationElement.RootElement,
onWindowOpenedHandler
);
element = onProcessWindowOpened(process);
}
else
{
process.Refresh();
}
}
};
Automation.AddAutomationEventHandler
(
WindowPatternIdentifiers.WindowOpenedEvent,
AutomationElement.RootElement,
TreeScope.Subtree,
onWindowOpenedHandler
);
process = Process.Start(startInfo);
while (element == null)
{
Thread.Sleep(10);
}
}
rootElement = element;
return(process);
}
