How to get the position coordinates of a shape drawn in Visio using MATLAB

I have been trying to draw an IO diagram in MS Visio using actxserver function of Matlab(2018b).

I am able to open Visio application and draw a rectangle with text in it. But I cannot get its position coordinates. If I would get the position coordinates of the rectangle drawn, I can draw the arrows to and from the rectangle showing the inputs and outputs of the block represented by the rectangle.

So, Can any one please tell me how to get the position coordinates of a shape drawn in Visio using MATLAB?!!

Thanks in advance