C/C++判断进程是否存在

#include <windows.h>
#include <tlhelp32.h>    //进程快照函数头文件
#include <stdio.h>

bool getProcess(const char *procressName)                //此函数进程名不区分大小写
{
    char pName[MAX_PATH];                                //和PROCESSENTRY32结构体中的szExeFile字符数组保持一致，便于比较
    strcpy(pName,procressName);                            //拷贝数组
    CharLowerBuff(pName,MAX_PATH);                        //将名称转换为小写
    PROCESSENTRY32 currentProcess;                        //存放快照进程信息的一个结构体
    currentProcess.dwSize = sizeof(currentProcess);        //在使用这个结构之前，先设置它的大小
    HANDLE hProcess = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);//给系统内的所有进程拍一个快照
<span style="color: #0000ff;">if</span> (hProcess ==<span style="color: #000000;"> INVALID_HANDLE_VALUE)
{
    printf(</span><span style="color: #800000;">"</span><span style="color: #800000;">CreateToolhelp32Snapshot()调用失败!\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
    </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;
}

</span><span style="color: #0000ff;">bool</span> bMore=Process32First(hProcess,&amp;currentProcess);        <span style="color: #008000;">//</span><span style="color: #008000;">获取第一个进程信息</span>
<span style="color: #0000ff;">while</span><span style="color: #000000;">(bMore)
{
    CharLowerBuff(currentProcess.szExeFile,MAX_PATH);        </span><span style="color: #008000;">//</span><span style="color: #008000;">将进程名转换为小写</span>
    <span style="color: #0000ff;">if</span> (strcmp(currentProcess.szExeFile,pName)==<span style="color: #800080;">0</span>)            <span style="color: #008000;">//</span><span style="color: #008000;">比较是否存在此进程</span>

        {
            CloseHandle(hProcess);                                //清除hProcess句柄
            return true;
        }
        bMore=Process32Next(hProcess,&currentProcess);            //遍历下一个
    }
CloseHandle(hProcess);    </span><span style="color: #008000;">//</span><span style="color: #008000;">清除hProcess句柄</span>
<span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;

}
int main()
{
</span><span style="color: #0000ff;">if</span> (getProcess(<span style="color: #800000;">"</span><span style="color: #800000;">qq.exe</span><span style="color: #800000;">"</span><span style="color: #000000;">))
{
    printf(</span><span style="color: #800000;">"</span><span style="color: #800000;">存在\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
}
</span><span style="color: #0000ff;">else</span><span style="color: #000000;">
{
    printf(</span><span style="color: #800000;">"</span><span style="color: #800000;">不存在\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
}
</span><span style="color: #0000ff;">return</span> <span style="color: #800080;">0</span><span style="color: #000000;">;

}