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Editorial Team
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Asked: 2026-05-17T23:18:46+00:00

Is it possible to get a control at the current mouse location if its

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Is it possible to get a control at the current mouse location if its in a window not known by the application? (not in Application.OpenForms)

I implemented a low level mouse hook which can get the mouse location anywhere on the screen, but I can’t seem to access controls outside of my application. What I want to be able to do is get a button in an OpenFileDialog. I can get a Handle to the dialog, but I can’t get the control from the dialog using Control.FromHandle() since this only works for controls that are in the Application.

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  1. Editorial Team

    It’s possible with the Win32 API. You need GetDlgItem() to get a handle to button you are looking for. Use Spy++ to find the control ID. An example of the kind of code you need is available in my post in this thread. That example is for an in-process dialog, it would work out-of-process as well.

    Beware that your code is liable to break on the next version of Windows.

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