Hi Bhawani,
If I understood your problem correctly, you need some help on syntax to be written while writing the code.
In order to be able to show some help with regards to the syntax, you need to enable Auto Quick Info. To enable the same, follow the steps given below:
1) Open code window / Visual Basic Editor Window
2) Click on Tools menu on the top and select Options
3) In the Options dialog box, ensure you have Auto Quick Info checkbox selected
4) Click on OK
After completing the above said steps, now when you type the method Replace and press space bar, you see a tool tip showing up with the syntax to be followed.