Updating Win32 window contents during resizes using callbacks specifically for SFML 2.6.0
This modification is based on the pull request by hobby8
The code has been slightly altered in WindowImplWin32.cpp: WM_PAIN changed to WM_TIMER. This alteration allows the window to receive callbacks even when the window size doesn't change (e.g. when the cursor is grabbed but not moved).
Download SFML 2.6.0, merge this repo into it, compile using CMake and VS. Example use case is in the main.cpp