Troubleshooting DPI Virtualization and DPI-aware applications, in Windows Vista and Windows 7

Question

I have a problem where an application (written in Delphi) is behaving properly at default 96 DPI settings on all systems, but is behaving inconsistently at the \"150% text size\

Answer 1

The "Custom DPI Setting" window has a "Use Windows XP style DPI scaling". That might explain the different behaviour.