Picture Manulipation Using HTML

hi i am adding a members area to my website, and i want users to be able to up load thier pictures, i have two questions about this, first one, could some one explane about the html intput, type=file, and any form processing it may require.

the second question is, is there a standard component, that can be used to resize the image, or will i need to find one that can be installed? and is there a free one?

http://aspupload.com

is there not any way to use <input type="file">

instead of an activex control?
and an asp component to resize image?