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dotnet/releases/net48/KnownIssues/wpf-pma-window-drag.md

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Per-Monitor DPI-aware WPF applications position mouse cursor incorrectly when dragging between monitors

Symptoms

A user running a WPF application that enables the Per-Monitor DPI awareness feature introduced in .NET Framework 4.7.2 may notice that the mouse cursor is in a different location relative to the window after dragging the window from one monitor to another.

Cause

This issue is caused by a calculation error when resizing and placing the window after switching DPI.

Resolution

This issue is being tracked at https://github.com/dotnet/wpf/issues/967.