Hi and welcome! 😃

When you make your model public, you can download/view the inventory and there's an option to export to bricklink as well.
For example: http://mecabricks.com/en/models/EMgaXRqrjz0 is a model available in public. If you check the "Inventory" tab, you will see 2 links. One to export the brick list and one to download the xml for bricklink.

If you don't want to publish your model to public, but you want to keep it private then it's also possible to obtain a brick list: http://mecabricks.com/en/forum/topic/296

Thank you Sim. I did it for the XML in bricklink. It works. Regarding the model public, may I know if I can public whatever I design?

You mean if you can make any model public you design? Normally you may; at least that's what most people do. They publish their mocs to show off to the world.

Ive pressed Export but it doesnt download it so what must I do ? pls help me...