016 程序单开应用 8

实现限制程序多开

测试代码

创建第一个程序ProcessMutexDemo.exe

#include <windows.h>
#include <stdio.h>
int main()
{
    HANDLE hMutex = CreateMutex(NULL, TRUE, TEXT("Demo"));
    //OpenMutex打开已经存在的
    //OpenMutex()
    WaitForSingleObject(hMutex,INFINITE);
    if(hMutex == NULL)
    {
        printf("hMutex == NUL");
    }
    while(true)
    {
        Sleep(1000);
    }
    return 0;
}

创建第二个程序ProcessMutexDemoB.exe

#include <windows.h>
#include <stdio.h>
int main()
{
    HANDLE hMutex = CreateMutex(NULL, TRUE, TEXT("Demo"));
    //OpenMutex打开已经存在的
    //OpenMutex()
    if(GetLastError() == ERROR_ALREADY_EXISTS)
    {
        printf("Is Extsts....");
    }
    while(true)
    {
        Sleep(1000);
    }
    return 0;

}

测试结果

单个的实现方法

#include <windows.h>
#include <stdio.h>
int main()
{
    HANDLE hMutex = CreateMutex(NULL, TRUE, TEXT("Demo"));

    if(GetLastError() == ERROR_ALREADY_EXISTS)
    {
        printf("Is Extsts....");
    }
    WaitForSingleObject(hMutex,INFINITE);
    if(hMutex == NULL)
    {
        printf("hMutex == NUL");
    }
    while(true)
    {
        Sleep(1000);
    }
    return 0;
}