Transparent Pixel in Delphi

When you place a glyph (bitmap-picture) on a button, the color of the pixel in the picture’s lower-left corner will be used as the transparent color.

Advertisements

High DPI Windows Features

Feature Windows XP Windows Vista Windows 7 Windows 8 Windows 8.1
DPI Virtualization of DPI-unaware apps No Yes Yes Yes Yes
DPI Virtualization of System DPI-aware apps No No No No Yes
API to declare DPI awareness level No Yes Yes Yes Yes
API to declare per-monitor DPI awareness No No No No Yes
APIs to retrieve system metrics and DPI Yes Yes Yes Yes Yes
Window notification of DPI change No No No No Yes
APIs to retrieve monitor DPI No No No No Yes
Requires reboot for monitor DPI change N/A N/A N/A N/A No
Requires a reboot/log off for system DPI change Reboot Reboot Log off Log off Log off
Per user DPI setting No No Yes Yes Yes
Auto configuration of DPI at first logon No No Yes Yes Yes
Viewing distance incorporated in default DPI calculation No No No No Yes