Want to set the Checkbox in Gmail Inbox

[shesharm]

I tried with the above mentioned code. But i am still not able to get it. I have tried to change column position also in the childitem. With the above code i got the error "Object doesn't support this property or method: 'ObjChildItem.name'
Line (27): "msgbox ObjChildItem.name". "
From 3rd column to 8th column i am able to highlight the value. But at the 1st and 2nd column where checkbox present , i am not able to highlight it.