Change image using scroll bar

I would like to be able to change the image in an excel file based on the value that is generated from a form scroll bar.

Specifically, I have 100 images that I want to correspond to numbers 1-100 in a cell. I know how to display the value of the scroll bar on to a specific cell but I cannot make it so the image automatically updates as the values in scroll bar change.

I would like the minute I change from two adjacent values (e.g. 49 to 50) for the image to automatically refresh.

I have been trying to do this by loading the images from a folder on an active x image box with the following VBA code:

Private Sub Worksheet_Change(ByVal Target As Range) 
    If Target <> Range("A1") Then Exit Sub 
    Select Case Target 
    Case "#1": Image1.Picture = LoadPicture("c:\images\1.bmp") 
    Case "#2": Image1.Picture = LoadPicture("c:\images\2.bmp") 
    Case "#3": Image1.Picture = LoadPicture("c:\images\3.bmp") 
    End Select 
End Sub

The images change when I manually type in and enter a new value in excel, but i would like the image to change as I scroll the scroll bar.

Any input would be greatly appreciated.