Initializing array of objects

I am initializing and array of objects, i need something like this:

Greyhound[1].StartingPosition = pictureBox1.Location;
Greyhound[2].StartingPosition = pictureBox2.Location;

and so on.. but I need to make it by a loop

for ( ......... ) { Greyhound.StartingPosition = ????????? // what should go here }