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POC# SendKeys.SendWait to a dialog of another Process (notepad.exe)
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copied!<p>I'm trying to do the following in C#:</p> <ul> <li>Open a new process (notepad.exe)</li> <li>Enter some text (using SendKeys)</li> <li>Close Notepad (deal with any confirmation dialogs)</li> </ul> <p>Here's what I got</p> <pre><code>Process p = new Process(); p.StartInfo.Filename = "notepad.exe"; p.Start(); // use the user32.dll SetForegroundWindow method SetForegroundWindow( p.MainWindowHandle ); // make sure notepad has focus SendKeys.SendWait( "some text" ); SendKeys.SendWait( "%f" ); // send ALT+f SendKeys.SendWait( "x" ); // send x = exit // a confirmation dialog appears </code></pre> <p>All this works just as expected, but now after I've sent ALT+f+x I get a "Do you want to save changed to Untitled" dialog and I would like to close it from within my applications by "pressing" 'n' for "Don't Save". However</p> <pre><code>SendKeys.SendWait( "n" ); </code></pre> <p>works only if my application has not lost focus (after ALT+f+x). If it did and I try to go back using</p> <pre><code>SetForegroundWindow( p.MainWindowHandle ); </code></pre> <p>this sets the focus to the main notepad window instead of the confirmation dialog. I used the <code>GetForegroundWindow</code> method from user32.dll and found out that the dialog handle is different than the notepad handle (which kinda makes sence) but <code>SetForegroundWindow</code> doesn't work with even with the dialog window handle</p> <p>Any idea how I can give the focus back to the dialog so that I can successfully use <code>SendKeys</code>?</p> <p>here's the full code</p> <pre><code>[DllImport("user32.dll")] static extern bool SetForegroundWindow(IntPtr hWnd); [DllImport("user32.dll")] static extern IntPtr GetForegroundWindow(); [DllImport("User32.DLL")] static extern bool ShowWindow(IntPtr hWnd, int nCmdShow); public const int SW_RESTORE = 9; ... Process p = new Process(); p.StartInfo.FileName = "notepad.exe"; p.Start(); Thread.Sleep( 1000 ); SendKeys.SendWait( "some text" ); SendKeys.SendWait( "%f" ); // send ALT+F SendKeys.SendWait( "x" ); // send x = exit IntPtr dialogHandle = GetForegroundWindow(); System.Diagnostics.Trace.WriteLine( "notepad handle: " + p.MainWindowHandle ); System.Diagnostics.Trace.WriteLine( "dialog handle: " + dialogHandle ); Thread.Sleep( 5000 ); // switch to a different application to lose focus SetForegroundWindow( p.MainWindowHandle ); ShowWindow( dialogHandle, SW_RESTORE ); Thread.Sleep( 1000 ); SendKeys.SendWait( "n" ); </code></pre> <p>Thank you</p>

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