mgxfrm20.dll is part of Frame Library, which is developed by Micrografx,Inc. Micrografx now is part of CoreDRAW, it’s a pioneer graphics software developer founded in 1982.
Frame library is part of Picture Publisher, a drawing and photo editing software. It allow you to capture, manage, correct, enhance and edit the picture.
This file is safe if you install any Micrografx software installed with Frame Library.