You have seen briefly that a Web Form consists of two elements: the actual page (the .aspx file) and the code behind it (the .aspx.vb file, also known as the code-behind-the-page class).
The actual page properties can be seen in the visual property editor, after clicking anywhere on the page. Some of the most used ones are summarized here:
aLink— The color of all active links (to other URLs) in the document
vLink— The color of visited links on the page
link— The color of unvisited links on the page
background— A picture tiled as a background for the page (if provided)
bgProperties— The properties of the picture (if any)
bgColor— Page background color
text— Page foreground (text) color
pageLayout— The model of the page ...