Here is a brief introduction to how to verify if a friend is online or invisible on QQ2013.
First, send an offline file to the friend to be tested, use the mouse to drag a non-empty file to the chat window, as shown in the figure, how to verify whether QQ2013 friends are online, and then in the "File Assistant" In the window, select “change to offline send ”, as shown in the figure, how to verify whether QQ2013 friends are online or not. Next, select the “Remove this file” option in the chat window with friends, how to verify as shown in the figure. QQ2013 friends are online four, and then click on the "Yes" button in the confirmation window, as shown in the figure, how to verify whether QQ2013 friends are online. 5. If the prompt is "Retracted successfully, the other party will not receive the file", indicating the other party. Is not really online, as shown in the figure, how to verify whether QQ2013 friends are online. 6. If the prompt “Cannot be withdrawn, your offline file has been delivered”, it means that the other party is “Online Stealth” status. Show how to verify if QQ2013 friends are online
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