Change in name clause and object clause

I want to change the name and object clause of a private limited company. What I have understood till now is that:

1. First, pass Board Resolution for change in name and change in object clause.

2. Then attach this resolution with form 1a and file with ROC with fee of Rs.500.

3. After that when the name is approved then we have to give notice for Extraordinary General Meeting and the same is to be held after which we will have to file Form 23 and then Form 1b.

First issue I am having is that whether I should file Form 23 before filing Form 1a or vice versa. Also, if I am filing Form 1a then only Board Resolution is required. Am I right? And when the approval by ROC is given then I should send the notice and Extraordinary General Meeting is to be held or notice of holding of EGM regarding change in name and object clause can be given prior to filing of Form 1a.

I need the solution urgently and if anyone can provide me with detailed guidelines then I would be very thankful.