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What is the WinForms equivalent to the following line of WPF code?

HwndSource.FromHwnd(_windowHandle).AddHook(HwndSourceHookHandler);
Davide Piras
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Chris
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2 Answers2

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In WinForms, you'd typically override WndProc in the control/Form in question. Since every control is effectively a HWND, you don't need the HwndSource style of hooking.

If you want to setup a Hook in C#, you can follow the guidelines in How to set a Windows hook in Visual C# .NET.

Reed Copsey
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  • Thanks - I appreciate your input. I am looking to have a class, separate from the respective form, handle the registering of messages etc., where the constructor will take in an instance of the Window/Form, at which point I need to know how, using the window's/form's handle, to register the messages. Apologies if my initial post was not clear. – Chris Aug 29 '11 at 17:39
  • @Chris: Are you after how to setup a Windows Hook, ie: http://support.microsoft.com/kb/318804 – Reed Copsey Aug 29 '11 at 17:40
  • Also see: http://msdn.microsoft.com/en-us/library/ms632589(VS.85).aspx for full details on Hooks – Reed Copsey Aug 29 '11 at 17:41
  • Reed - yes - specifically curious about how to setup a Windows Hook. – Chris Aug 29 '11 at 17:46
  • @Chris: Okay - that first link (edited my answer to include it) walks through how to do it ;) – Reed Copsey Aug 29 '11 at 17:48
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Inside your own process, you can use the Application.AddMessageFilter method to listen to specific events before they are dispatched anywhere. This doesn't work between processes.

I found this while searching for an answer to one of my questions about handling of mouse events between parent and child controls.

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Paul Williams
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