How to initialize a QProcess in the following windows

[Max Fleischer]

I've figured out a solution now. I use getter and setter functions. I put the functions in public of both control_window and configuration_window and define it in the Source files.

Header configuration_window:

public:
    QProcess *process() const;
    void setProcess(QProcess *process);

public:
    QProcess *process() const;
    void setProcess(QProcess *process);

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Header control_window:

public:
    QProcess *process() const;
    void setProcess(QProcess *process);

public:
    QProcess *process() const;
    void setProcess(QProcess *process);

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Source configuration_window:

QProcess *configuration_window::process() const
{
    return m_opc_ua_server;
}
void configuration_window::setProcess(QProcess *process)
{
    m_opc_ua_server = process;
}

QProcess *configuration_window::process() const
{
    return m_opc_ua_server;
}
void configuration_window::setProcess(QProcess *process)
{
    m_opc_ua_server = process;
}

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Source control_window:

QProcess *control_window::process() const
{
    return m_opc_ua_server;
}
void control_window::setProcess(QProcess *process)
{
    m_opc_ua_server = process;
}

QProcess *control_window::process() const
{
    return m_opc_ua_server;
}
void control_window::setProcess(QProcess *process)
{
    m_opc_ua_server = process;
}

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In the Click Event that opens the next window I call the set function

m_control_window->setProcess(process());

m_control_window->setProcess(process());

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Now I can use m_opc_ua_server in control_window.