code_app/app/scantool/main.cpp

#include "mainwindow.h"
#include <QApplication>
#include "base/HGDef.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

#ifdef HG_CMP_MSC
    HANDLE hMutex = CreateMutexW(NULL, FALSE, L"{A8856E3B-3B67-43e4-82AD-154258C0FD37}");
    assert(NULL != hMutex);
    if (GetLastError() == ERROR_ALREADY_EXISTS)
    {
        CloseHandle(hMutex);
        return -1;
    }
#endif

    MainWindow w;
    //w.show();
    int ret = a.exec();

#ifdef HG_CMP_MSC
    CloseHandle(hMutex);
#endif
    return ret;
}