Retrieve information about the system.

ADesktopAreaStores the dimension of the visible desktop (not including the system taskbar or any application desktop toolbars) area into an array.
ADesktopsStores all desktops associated with the specified window station of the calling process into an array.
ADisplayDevicesStores information about the display devices in the current session into an array.
AResolutionsStores information about all graphics modes (resolutions) for a display device into an array.
AWindowStationsStores the name of all window stations in the current session into an array.
ExpandEnvironmentStringsExpands environment variables in the passed in string.
GetLocaleInfoExRetrieves information about a locale.
GetSystemDirectoryRetrieves the path of the windows system directory.
GetWindowsDirectoryRetrieves the path of the Windows directory.
OsExRetrieves the current operating system.