獲取螢幕大小第二篇 物理大小GetDeviceCaps 上
阿新 • • 發佈:2019-01-27
Note: MSDN對GetDeviceCaps函式有說明:GetDeviceCaps reports info that the display driver provides. If the display driver declines to report any info,GetDeviceCaps calculates
the info based on fixed calculations. If the display driver reports invalid info,GetDeviceCaps returns the invalid info. Also, if the display driver declines to report info,GetDeviceCaps might calculate incorrect info because
it assumes either fixed DPI (96 DPI) or a fixed size (depending on the info that the display driver did and didn’t provide). Unfortunately, a display driver that is implemented to the Windows Display Driver Model (WDDM) (introduced in Windows Vista) causes
GDI to not get the info, soGetDeviceCaps must always calculate the info.