In Coreldraw x3, x4, x5, x6, x7 there is any Display resolution limitation? Please check this pic. in Photoshop full screen mode, no pattern will be display. & in Coreldraw full screen preview moire pattern is showing? why this happened if screen resolution is same for both application.
http://www.northlight-images.co.uk/article_pages/cameras/1ds3_af_micoadjustment.html
In this section How to check focus accuracy,
Download the pic & check 1000x1000 pixels
Pl. let me know how to solve this problem.