To change the fonts, color of letters and the like on the pages of various sites on the Internet, there are special characters tags. Tag for strikethrough text "Vkontakte" looks like ̶. The highlight is the combination of characters with the left mouse button (together with the semicolon, but without the point).
Click on the keyboard at the same time the Cntrl button and the letter C (this is hot keys for copying text). Place the cursor before the text that you want to void and press Cntrl and the letter V (this is different hotkeys - command "paste" copied).
In the same way, insert a tag after each character (letter or sign) of your text. For example, the word "Hello" should look so: ̶p̶R̶̶̶e̶t̶. Now after sending the message "Hello" will be crossed out.
If you need to cross out in "Vkontakte" body text, a manual method may be too time-consuming. In this case, you can use one of the special scripts are tools designed to strikethrough text. Through any search engine on the Internet you can find many such services. You will need to do is enter your text in one window and in another, it will appear crossed out. Copy the text from the second window to window messages "Vkontakte".
You can also install on his page "Vkontakte" one of the applications that will allow you at any time to strike out, to underline, to outline the frame or flip the text in the status or message.
To do this select the page in the top menu click "Games". In the resulting search box type the word "text". From the list, select the appropriate app and install it on your page.