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Is there a way you can send a Paste or SendKeys to a control on an external window, if you know the Handel by using Spy++?
 
Or even set focus to that window and then to the control? Then SendKeys
Posted 28-Dec-12 4:50am

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Solution 1

Yep, of course this is possible.
you can achive this by using P/Invoke technologi in .NET environment.
 
So basically you must retreive a window handle (HWND) by it text (caption) and
mark this window as foreground with help of (WIN32 API):
[DllImport("user32")]
private static extern bool SetForegroundWindow(IntPtr hwnd);
 
[DllImport("user32.dll")]
private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
 
and then you might just send data like
        SendKeys.SendWait("{TAB}");
        SendKeys.SendWait("{TAB}");
        SendKeys.SendWait("{ENTER}");
 

Or even more with help of
SendMessage(_hWnd, 0x100, (int) VKeys.VK_2, (int) VKeys.VK_2);
 
you can achive better result
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