I want to create a simple Tcp Communication project but I get some problems and I dont know how to solve that problem. When I try to find solution all people tell add this code (QT += network)on .pro file but in ui projects I dont have any pro file so I dont know the find the solution.

//commu.h

Qt Code: 
  1. #ifndef COMMU_H
  2.     #define COMMU_H
  3.  
  4.         #include <QtWidgets/QMainWindow>
  5.         #include "ui_commu.h"
  6.         #include <QtNetwork/QTcpSocket>
  7.         #include <QObject>
  8.         #include <QString>
  9.  
  10.         class commu : public QMainWindow
  11.         {
  12.         	Q_OBJECT
  13.  
  14.         public:
  15.         	commu(QWidget *parent = 0);
  16.         	~commu();
  17.  
  18.         	 void start(QString address, quint16 port);
  19.  
  20.         private:
  21.         	Ui::commuClass ui;
  22.         	QTcpSocket client;
  23.         public slots:
  24.         	void startTransfer();
  25.         };
  26.  
  27.         #endif // COMMU_H
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//commu.cpp

Qt Code: 
  1. #include "commu.h"
  2.     #include <QtNetwork/QHostAddress>
  3.  
  4.     commu::commu(QWidget *parent)
  5.     	: QMainWindow(parent)
  6.     {
  7.     	ui.setupUi(this);
  8.  
  9.     	connect(&client, SIGNAL(connected()),this,SLOT(startTransfer()));
  10.     }
  11.  
  12.     commu::~commu()
  13.     {
  14.     	client.close();
  15.     }
  16.  
  17.  
  18.     void commu::start(QString address, quint16 port)
  19.     {
  20.     	QHostAddress addr(address);
  21.     	client.connectToHost(addr, port);
  22.     }
  23.  
  24.     void commu::startTransfer()
  25.     {
  26.     	client.write("Hello, world", 13);
  27.     }
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//main.cpp

Qt Code: 
  1. #include "commu.h"
  2.     #include <QtWidgets/QApplication>
  3.     #include <QtCore>
  4.  
  5.     int main(int argc, char *argv[])
  6.     {
  7.     	QApplication a(argc, argv);
  8.     	commu w;
  9.     	w.show();
  10.     	return a.exec();
  11.  
  12.     	commu client;
  13.     	client.start("127.0.0.1", 8888);
  14.  
  15.     }
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I get the errors:

Qt Code: 
  1. 1>commu.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall QTcpSocket::~QTcpSocket(void)" (__imp_??1QTcpSocket@@UAE@XZ) referenced in function "public: virtual __thiscall commu::~commu(void)" (??1commu@@UAE@XZ)
  2.     1>commu.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall QTcpSocket::QTcpSocket(class QObject *)" (__imp_??0QTcpSocket@@QAE@PAVQObject@@@Z) referenced in function "public: __thiscall commu::commu(class QWidget *)" (??0commu@@QAE@PAVQWidget@@@Z)
  3.     1>commu.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall QHostAddress::~QHostAddress(void)" (__imp_??1QHostAddress@@QAE@XZ) referenced in function "public: void __thiscall commu::start(class QString,unsigned short)" (?start@commu@@QAEXVQString@@G@Z)
  4.     1>commu.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall QHostAddress::QHostAddress(class QString const &)" (__imp_??0QHostAddress@@QAE@ABVQString@@@Z) referenced in function "public: void __thiscall commu::start(class QString,unsigned short)" (?start@commu@@QAEXVQString@@G@Z)
  5.     1>c:\users\sel\documents\visual studio 2010\Projects\commu\Win32\Debug\\commu.exe : fatal error LNK1120: 4 unresolved externals
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