Program for Mac to poll a server

We need a simple program, to run on a Mac, to periodically poll an HTTP server and pop up a message box if a certain condition is met. The message box shall contain two buttons - on to simply dismiss the box and another to open a webpage in the user's browser. Ideally the program should use wxWidgets and be written in C++. We have a version compiled for Windows which we can make available to the selected Freelancer for illustration. Only bids from freelancers based in European (not necessarily EU) countries will be considered. To demonstrate you have read these details, begin your bid with a common salutation or greeting in the official language of the country you are based in. Non-Mac specific technical assistance can be provided so this could be a good project for freelancers just starting out. We should like the work completed in a reasonable time but bids quoting unrealistic time scales will not be considered.