It is an extremely small download, and after whizzing through the installation process you should be looking at a little window with a series of options you can set to get the program operating for you.
You can get started with this handy, free little program by following this link to its download page. You can use it to keep a window at the top, force a dialogue to stay active while you are away, or any number of other tasks.
If you have ever been in a situation in which you needed something clicked every couple seconds and did not want to expose your hand to crippling carpal tunnel symptoms, you may have benefited from Free Mouse Auto Clicker, which automatically single or double clicks wherever the cursor is on the screen.