Screenshot really helps. The simplest way is to create a child object for each icon and set the size to the top icon "defined area". Best to use a mask of the top icon. Basically it acts as an overlay.

For scripting the issue is a little more complex if you've used the normal desktopX settings for mouse over, mouse away, and mouse down.

To do it by script I believe you would have to script all of these states in order to restrict the mouse area. There's a couple ways but, probably the onstate change would be the easiest.

You need not to split image in two parts. Just create a new object and set any image for it with dimensions of the area you want to cover for activation. Take this object on top of your icon, set this object opacity 1%, set target of this image as u want for icon, set activation of the icon as "none". Now if you want to change brightness or contrast of the icon on mouse over of the transparent image then use this simple script for your trasparent image.

‘For increasing brightness of icon on mouse over to transparent image
Sub Object_OnMouseEnter
DesktopX.Object("your icon name").Brightness = 10
DesktopX.Object("your icon name").Contrast = 20
End Sub

‘For reseting bightness and contrast on mouse leave
Sub Object_OnMouseLeave
DesktopX.Object("your icon name").Brightness = 0
DesktopX.Object("your icon name").Contrast = 0
End Sub

You can also use the script which inspects mouseposition but it will be a bit difficult.

good work again Adam!

Woot! SirSmiley always has a solution.    I would prefer the the scripted one, but that's just me.

Ok I'm trying with the SirSmiley way but I have some problems because the animation doesn't work. Here is the Link for if you can help me.

My first attempt was with the HAPTORK directions but I think that I'm doing something wrong .

BTW any of you that have great knowledge with ObjectX but lake in graphics skill please I'm open for work together.

Thanks a lot.

Ok. This should work.

It took me a bit and gave me a laugh because often the simplest answer is the solution. Your Child Object needs to have Left & Top settings set to 0.

Actually your left should be 32.

Note:
When you drag the child object it will move off of the main object.
If these objects are going to be movable then you need to set up a group for both objects so the child doesn't move off of the first.
If the objects are to be locked in place then just set your main object status to locked and the child object will automatically inherit that.

It works for me. Here's a link to my edited version Box.net.

You need to rename the states to avoid the animation when moving the mouse over the reflection.

If the main object is to be locked in one spot, you could leave the state names unchanged and set the main object status to not active. Then make sure the child object is set to no.