Start Qt application as Windows Service

[^NyAw^]

Hi,

The application try to read a config file but removing all this code and only setuping the gui with "ui.setupUi(this);" don't work.

I have added a little code on main.cpp that writes "Hello" on a file. It works executing it but not starting by the service.

Thanks,

[wysota]

Try compiling and running a non-Qt app like this one:

int main(){
  while(1);
  return 0;
}

int main(){
  while(1);
  return 0;
}

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If it works, try adding a QCoreApplication and then a QApplication. Observe what happens in each.

[^NyAw^]

Hi,

I compiled the simple application and it starts.
Then I created a simple Qt console application that uses QCoreApplication and it is not started by the service.

Thanks,

[^NyAw^]

Hi,

I copied the Qt libs on the application dir and the QCoreApplication starts.
Then I tryied to create a QApplication and it starts.
Finally tryied my application and starts.
So, I think that when start the application by a Windows Service, the libs must be on the "system32" dir or on the same dir of the application.

Thanks wysota,

[^NyAw^]

Hi,

The QTDIR path is set as User variable on Windows, so if the service is started as "LocalSystem" it don't have QTDIR path so when try to start my application don't work.

So one solution could be to set the QTDIR on the Path of the system instead of the path of the current user.
Second solution is to copy the Qt libs into the "system32" folder where are the system libs.
Third solution is to copy the Qt libs on the application directory.

[wysota]

As I said - a path problem. Your libs must be accessible, regardless of system configuration. The only safe place to put them is system32 directory.

[^NyAw^]

Hi,

Thanks for help,