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I am trying to debug a strange issue with users that have LogMeIn installed. After a few days, some of my dialogs that my app opens can end up offscreen. If I could reliable detect that, I could programmatically move the dialogs back where they are visible again.
Note: this has to work for multiple monitors and use the win32 API. However, if you know how to do it from .NET I can probably extrapolate from there...
Update: For the curious, the bug mentioned above has to do with wxWidgets. If you run a wxWidgets application, then walk away and let your screen saver go, then log in remotely with LogMeIn, then try to open a dialog from your app, you will have trouble if you use wxDisplay::GetFromPoint(pos) or wxWindowBase::Center() to position the dialog.
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The easiest way to get back a hidden window is to just right-click on the Taskbar and select one of the window arrangement settings, like “Cascade windows” or “Show windows stacked.”
Hold down the Shift key, then right-click on the appropriate application icon in the Windows taskbar. On the resulting pop-up, select the Move option. Begin pressing the arrow keys on your keyboard to move the invisible window from off-screen to on-screen.
Open File Explorer from the taskbar. Select View > Show > Hidden items.
If the script runs via Task Scheduler or like, it will run when the screen is off (computer ON, screen OFF).
Simply use MonitorFromWindow with the MONITOR_DEFAULTTONULL flag. If the return value is null, your window is not visible. You can subsequently pass MONITOR_DEFAULTTONEAREST to be able to reposition your window on the nearest monitor.
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