[Qt-interest] How to use QtSingleApplication.dll?

[程梁]

Hi, there! I want to use QtSingleApplication.dll on Windows. I use QLibrary
to load this dll successully,
when program runs, Qt tell me that I should instantiate the QApplication
object first.
Then how can I use QtSingleApplication instead QApplication from the dll
file before the QApplication create?
Must I add the sources of QtSingleApplication into my project in order to
use it?

Thank you!

-- 
Cheng Liang
from: chengliang.soft at gmail.com
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