Scroll Height of a child window using Windows API?
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Does anyone know how to get the height of a scrollable child window using Windows API? I've found GetWindowRect but that appears to only return the RECT of the "visible" area but I want the RECT of the entire "scrollable" child window. This window is a 3rd party window so I would need to use, I'm assuming, the User32 WinAPI functions.

Thanks! 