Find Pixel Color Of "Maze" Wall?

I'm trying to work up a "Pacman" like game. I used multiple (Blue) RectangleShapes to draw a maze on Form1 and added a Timer and KeyPress event to show motion of the Picturebox ("PacmanImage"). The "Pacman" image changes depending on the direction it's travelling (also opens/closes mouth). Up/Down/Left/Right (and closed mouth) images are stored in imagelist1.

The maze has been set up with just enough clearance for the Pacman to fit between the walls. How can I check for any part of a Blue wall (RectangleShape) in the path of the Pacman? - I was thinking to take the position of the PacmanImage Picturebox and check (depending on the direction of travel) for the existence of a blue color in the appropriate rectangle on that leading edge. Ie: left travel would look at a rectangle defined as (x-1,y) to (x-1,y+25) and try to find the color blue where x/y are the top left of PacmanImage and it's image size is 25x25. Not sure how to do all this, but I think it's the right idea...

The ImageList has index/picture: 2/PacDown, 3/PacLeft, 4/PacMid, 5/PacRight, 6/PacUp (Indexes 0/1 are used for two additional pics not used for the motion of the Pac).

Code So Far:

Public Class Form1
Dim LeftRight As Integer = 180
Dim UpDown As Integer = 103
Dim Increment1 As Integer = 5

[code]....