[img]https://[URL=https://imageshack.us]ImageShack.us[/URL][/img]
Ok so what you do is, you upload the image. when you do, there should be a box labeled "Direct Link" or something to that effect. Highlight that box, and copy the URL. Paste the text between a [img] tag and a [/img ] end tag (No space though).
Another way that you can get the code, if there is no Direct Link box, is:
Find the image (Must be online; not in your folders)/
Right Click -> Properties
Under Address(URL, there is a URL. That is the URL of the Image and may be included between the tags.