Question

Is it possible to disable the hittest on a Windows Forms window, and if so, how do I do it? I want to have a opaque window that cannot be clicked.

Thanks in advance,
Christoph

Answer 1

If you’re talking to a different process, you need to send and retrieve Windows messages.

http://www.c-sharpcorner.com/UploadFile/thmok/SendingWindowsMessageinCSharp11262005042819AM/SendingWindowsMessageinCSharp.aspx

Have a look at this link:

Using Window Messages to Implement Global System Hooks in C#
http://www.codeproject.com/KB/system/WilsonSystemGlobalHooks.aspx

Global system hooks allow an application to intercept Windows messages intended for other applications. This has always been difficult (impossible, according to MSDN) to implement in C#. This article attempts to implement global system hooks by creating a DLL wrapper in C++ that posts messages to the hooking application’s message queue.