SetProcessDpiA

SetProcessDpiAwareness is a function in the Windows API that allows applications to specify their DPI (Dots Per Inch) awareness level. DPI awareness is crucial for ensuring that applications display correctly on high-DPI displays, such as those found on modern laptops and high-resolution monitors. By setting the DPI awareness level, an application can control how the system scales its user interface elements, fonts, and other graphical content.

The function takes a single parameter, which is a value from the PROCESS_DPI_AWARENESS enumeration. The possible values are:

PROCESS_DPI_UNAWARE: The application is not DPI aware. The system scales the application's UI elements according to the system DPI setting.

PROCESS_SYSTEM_DPI_AWARE: The application is system DPI aware. The system scales the application's UI elements according to the system DPI setting, but the application can query the DPI settings and adjust its UI elements accordingly.

PROCESS_PER_MONITOR_DPI_AWARE: The application is per-monitor DPI aware. The system scales the application's UI elements according to the DPI setting of each monitor that the application's windows are displayed on.

To use SetProcessDpiAwareness, an application must first include the necessary headers and link against the appropriate libraries. The function should be called early in the application's initialization process, before any UI elements are created. Once the DPI awareness level is set, the application can use other Windows API functions to query the DPI settings and adjust its UI elements accordingly.

SetProcessDpiAwareness is an important function for developers who want to ensure that their applications display correctly on high-DPI displays. By setting the appropriate DPI awareness level, applications can provide a better user experience and ensure that their UI elements are properly scaled and displayed.