Small & simple custom application needed

Hi, I need someone to write a very simple application that runs on windows and can run with wine on mac OS X. Specs: - The custom application should detect when a new window of a third party application is opened - Following this, the custom application should project certain information (text) onto the third party window. Think of how a 'hud' usually projects info onto a parent screen. - The position of the information should be responsive to resizes of the third party windows it is projected in. - When a third party window is closed, the information display should be killed too. - There is no communication needed between the custom application and the internal processes of the third party application. It's just a matter of projecting. More details can be send by message.