The issue is already reported to Microsoft and Microsoft fixed in in Visual Studio 2017 15.6 when you recompile your code. Here the fixed MFC without the slow Get/SetPixel is used.
To fix in in Windows 10 for current and older compiled tools which use MFC, Microsoft released the Update KB4058258. The release notes don’t mention the fix, but it is confirmed by the reporter that the fix is part of the cumulative update.
So installing the Update should fix it. So if you have the issue, make sure you run at least Build 16299.214 (run winver.exe to see the number).
If you have this or a higher number at last position, the issue should be gone.
The old and outdated information are archived. See the revisions of this answer for the old workarounds.