QtCreator: Loading External Library - c++

Question

So I've been developing a small ACARS (plane tracking system) for the VATSIM network and apart of this entails using the FSUIPC library to interact with Flight Sim X. I have the program working beautifully in VS2010 but when I attempt to use any functions from FSUIPC I get the error:
"mainwindow.obj:-1: error: LNK2019: unresolved external symbol FSUIPC_Open referenced in **function "public: void __cdecl MainWindow::connectFSUIPC(void)" (?connectFSUIPC#MainWindow##QEAAXXZ)"**
From some research I've learnt that this is a library load error and for the life of me I can't figure out how to get it working. Below is the code for all files I am using.
AcarsTest.pro
#-------------------------------------------------
#
# Project created by QtCreator 2013-12-16T23:56:06
#
#-------------------------------------------------
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = AcarsTest
TEMPLATE = app
SOURCES += main.cpp\
mainwindow.cpp
HEADERS += mainwindow.h
FORMS += mainwindow.ui
INCLUDEPATH += "D:/Windows/QT/Tools/QtCreator/bin/AcarsTest/"
LIBS += -LD:/Windows/QT/Tools/QtCreator/bin/AcarsTest/ -lFSUIPC_User
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <Windows.h>
#include <FSUIPC_User.h>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
void connectFSUIPC();
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
main.cpp
#include <Windows.h>
#include "mainwindow.h"
#include <QApplication>
#include "FSUIPC_User.h"
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::connectFSUIPC()
{
DWORD dwResult;
if(FSUIPC_Open(SIM_ANY, &dwResult))
{
}
}

Answer 1

try change code like this
your code:
LIBS += -LD:/Windows/QT/Tools/QtCreator/bin/AcarsTest/ -lFSUIPC_User
replace by
win32:LIBS += "D:/Windows/QT/Tools/QtCreator/bin/AcarsTest/FSUIPC_User.lib"