How to launch a windows application in Qt

Question

I'm in the process of trying to figure out how to launch a windows application in Qt. What I'm trying to accomplish is for the user to click on a button and the notepad windows application opens. I understand that their is a notepad feature in Qt, but I looking for a different way to do this. I want to possible be able to do this with any windows application. Does anyone have any hint on how I can accomplish this?

Answer 1

Qt has special class QProcess which allows you to do this.

For example:

void MainWindow::on_pushButton_clicked()
{
    QProcess *proc = new QProcess(this);
    proc->start("notepad.exe");
}

There are many useful methods in this class. Check it in the documentation:

http://qt-project.org/doc/qt-5/QProcess.html

Also you can open file in this app. Just use:

proc->start("notepad.exe path"); 

where path is something like this: G:/test.txt

To use this class you should #include <QProcess>

Answer 2

You can use QProcess class, look at start or startDetached, example:

QProcess::startDetached("notepad.exe");