https://root.cern.ch/doc/v624/classROOT_1_1MacOSX_1_1X11_1_1UpdateWindow.html
ROOT: ROOT::MacOSX::X11::UpdateWindow Class Reference
rootmacosxclassreference
https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-updatewindow?redirectedfrom=MSDN
UpdateWindow function (winuser.h) - Win32 apps | Microsoft Learn
The UpdateWindow function updates the client area of the specified window by sending a WM_PAINT message to the window if the window's update region is not...
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https://root.cern.ch/doc/master/classROOT_1_1MacOSX_1_1X11_1_1UpdateWindow.html
ROOT: ROOT::MacOSX::X11::UpdateWindow Class Reference
rootmacosxclassreference