判断某进程是否存在

BOOL IsProcessExist(LPCWSTR ProcessName)
{
BOOL ProcessExist=false;
PROCESSENTRY32 my;
HANDLE handle = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0); //创建进程快照
if (((int)handle) != -1)
{
my.dwSize = sizeof(my);
if (Process32First(handle, &my))
{
do
{
//CharLowerBuff(my.szExeFile, MAX_PATH);//转换成小写字母
if(StrCmpW(ProcessName ,my.szExeFile) == 0)
{
DWORD dwProcID = my.th32ProcessID;
ProcessExist=TRUE;
break;
}
else
{
ProcessExist=FALSE;
}
}while (Process32Next(handle, &my));

}
CloseHandle(handle);
}
return ProcessExist;
}