WindowPlacement Gets New Constants
The FrameExec and FrameSource classes WindowPlacement attribute has four new constants to support multiple monitors. These settings are supported only on Microsoft Windows systems.
WP_PRIMARYSCREENCENTERED
Centers the window on the primary monitor
WP_PRIMARYSCREENRELATIVE
Positions the window relative to the upper left corner of the primary monitor, using the WindowXLeft and WindowYTop attributes as coordinates
WP_VIRTUALSCREENCENTERED
Centers the window on the virtual monitor
WP_VIRTUALSCREENRELATIVE
Positions the window relative to the upper left corner of the virtual monitor, using the WindowXLeft and WindowYTop attributes as coordinates