Windows 3.x High-Speed Communications Library and Tools.
ScrollDC shifted buffer pixels during parsing before dirty rows were rendered, causing unrendered garbage to propagate into non-dirty rows on successive scrolls. Replace with FAllDirty to repaint all rows from cell data after any scroll. With batched TextOut this costs ~250 GDI calls per scroll instead of the old 12,000, so the overhead is minimal. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> |
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