How to send keystrokes to window not in foreground

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Hi!

I want to send keystrokes to window that is not focused. To another application.
Can you show me some tutorials or, tell me how.

Thanks!

Posted 20-Nov-11 21:06pm

Mitran Stefanita Alexandru

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Sergey Alexandrovich Kryukov 21-Nov-11 3:26am

Why doing so?
--SA

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Mitran Stefanita Alexandru · Answer 1 · 2011-11-20T22:03:00

I found this, but I don't know how where to found the key codes for "WM_KEYDOWN", do you know a list of all the keys transformed for "WM_KEYDOWN"?

C#

[DllImport("User32.Dll", EntryPoint = "PostMessageA", SetLastError = true)]
public static extern bool PostMessage(IntPtr hWnd, uint msg, IntPtr wParam, IntPtr lParam);

PostMessage(winHandle, (uint)WM_KEYDOWN, (IntPtr)66, IntPtr.Zero);

Sergey Alexandrovich Kryukov · Answer 2 · 2011-11-20T21:30:00

Basically, this is a bad idea. It depends on the application to be "controlled" this way. You cannot just use SendInput, so you need to rely on some message processing using HWND and P/Invoked SendMessage/PostMessage without reliable results.

If this is your application and you want to use this method just for UI development, this is all wrong: you can always use "legal" programming method. If not, any results are not reliable. There is a good principle: develop software, not integrate. And this is certainly not a good method of "integration".

Perhaps, explain you ultimate goals to get a chance to get some positive advice.

—SA

How to send keystrokes to window not in foreground

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