8楼: Originally posted by 小快乐小知足 at 2012-10-05 18:31:47
我不怎么会用这个?能麻烦你说细一点吗?谢谢了!!!!!
补充:我建的两个工程都是"MFC AppWizard(exe)"...

class CADlg : public CDialog
{
// Construction
public:
        CADlg(CWnd* pParent = NULL);        // standard constructor
        HANDLE mutexhandle;

void CADlg::OnDestroy()
{
        CDialog::OnDestroy();
        CloseHandle(mutexhandle);/*这行是增加的，退出的时候关闭句柄*/
        // TODO: Add your message handler code here
}

BOOL CADlg::OnInitDialog()
{
        CDialog::OnInitDialog();
        /*此处省略一部分代码，下面那行是添加的，程序初始化的时候，初始化那个mutex*/
        // TODO: Add extra initialization here
        mutexhandle = CreateMutex(NULL,TRUE,"MyMutex");

        return TRUE;  // return TRUE  unless you set the focus to a control
}

void CADlg::OnButton1()
{
        // TODO: Add your control notification handler code here
        WinExec("b.exe",SW_SHOW        );
}

BOOL CBDlg::OnInitDialog()
{
        /*省略部分代码，下面是初始化的时候，判断有没有被创建过mutex，如果还没有，就退出*/
        // TODO: Add extra initialization here
        int ret;
        HANDLE h;
        h = CreateMutex(NULL,FALSE,"MyMutex");
        ret = GetLastError();
        CloseHandle(h);
        if(ERROR_ALREADY_EXISTS != ret)
                ExitProcess(0);
        return TRUE;  // return TRUE  unless you set the focus to a control
}

2楼: Originally posted by jmck99 at 2012-10-04 02:19:20
把工程2写成dll