Thank you Meshka + everyone else :-)
Disliked1.You push printscreen button to copy desktop You want to share here.
2. In Photoshop You press File>New or Ctrl+N and it will open You new blank white document, in which You press Ctrl+V to paste Your caption.
3. After that You can edit, crop or add some text to Your image.
4. Now You go File>Save for web and Devices... and save Your image as jpg or gif (image size no bigger than 1500x1500 px) to Your desktop or wherever You choose.
5. Now You can attach it while posting in this forum... hope You know how.Ignored