Hi Sharma,
1. Why we are adding 2 in TopX & 4 in TopY in the below stmt. Although this code is working fine without this addition.
When I worked with this code, it was not working without this addition. Can you try your code with different resolution? If it is working fine, then leave as it is.
2. What is wrong with my approach as you are putting the Mouse Move on "Heading1" column and I am putting the Mouse Move on the Web Table for the same?
In your code you are taking x and y from webtable. The problem is: when you position the mouse pointer with webtable cooridnates, mouse pointer is not changed. So I have taken x and y from webtable's first child (I.e. row1, col1), now the mouse pointer is changed into selection cursor. You can also try this manually, you will see the difference.