Run an .exe from other's application function

jk_mk

Hi,

I have created two different applications seperatly.A form named window and a form named my_mainwindow, and I want to run the window.exe when I call a press button function my_mainwindow application. I have written the following code, I debug my_mainwindow without any errors, but when I press the button I don't get my window form from the window.exe file.Also when I insert in my code the (system("pause");), when I press the button I get the cmd.exe .Could somebody help me?

@QObject::connect(pushButton_openFile, SIGNAL(clicked()), this, SLOT(push_button_File()));@

//////////////////////////////////

@void my_mainwindow::push_button_File(void)
{

QProcess::execute("E:\Qt tutorial\Qt applications\window\window\window.exe");

// system("pause");
return ;
}@

marko-a

It likely has something to do with exe-file path. Try placing both EXE files in a same folder and use relative path... Also, why not make an instance of QProcess and use start() method as described "here":http://doc.qt.nokia.com/latest/qprocess.html#details?

jk_mk

I have moved both .exe files in the same directory and I have tried this, but with no any good result

@void my_mainwindow::push_button_File(void)
{

QString program = "E:\Qt tutorial\Qt applications\my_mainwindow\my_mainwindow\window.exe";
QProcess *myProcess = new QProcess(this);
myProcess->start(program, 0);

return ;
}@

marko-a

You should also change path to "window.exe". Also, as a second argument you are suppling 0. Why? If you have no arguments to send try: myProcess->start(program). Furthermore you should listen "some of these signals":http://doc.qt.nokia.com/latest/qprocess.html#signals to make sure window.exe is running, closing etc.

jk_mk

To change path to "window.exe", this should be done from my project's properties, in my visual studio that I am using for the project?

marko-a

No no, I was referring to:
@QString program = "E:\Qt tutorial\Qt applications\my_mainwindow\my_mainwindow\window.exe";@
It should be:
@QString program = "window.exe";@

Also, you should try to run both apps from outside the IDE. Navigate to folder and run both EXEs. This is to make sure apps are not missing any DLLs.

jk_mk

This was my mistake. I should have QString program = "window.exe"; in my code.
Thanks a lot for your help.

goetz

And change the path separators from backslashes ("") to regular forward slashes ("/"). Qt does the translation for you and if you really want to use the, you must double quote them, as the C/C++ compiler interprets them as string specials (like "\n"):

@
QString program = "E:/Qt tutorial/Qt applications/my_mainwindow/my_mainwindow/window.exe";
@

jk_mk

thanks for your reply