What happens if you change a window class’s GCL_CB­WND­EXTRA?

· Raymond Chen · Sept. 5, 2026, 5:31 a.m.
Code Old New Thing Windows development GCL_CBWND_EXTRA software development Technical Insights
Summary
This blog post discusses the implications of altering the GCL_CBWND_EXTRA value for window classes, specifically how it affects future window instances. It seems to offer a technical insight related to software development but lacks originality as it refers to another post.
Read full post on devblogs.microsoft.com →
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