INT 2F - Windows 3.x - SWITCHING DOS TO FOREGROUND
AX = 4006h
Note:   called by Windows when the DOS box is about to be placed in the
foreground and the video driver should restore any necessary state
information
SeeAlso: AX=4005h

See also: 2F4002

2F4006 - Windows 3.x - SWITCHING DOS TO FOREGROUND