DWORD ProcessHelper::FindProcessIDByName(const std::string& processName)//0 not found ; other found; processName "processName.exe"
{
HANDLE hProcessSnap;
PROCESSENTRY32 pe32;
hProcessSnap = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 );
if( hProcessSnap == INVALID_HANDLE_VALUE )
{
return( 0 );
}
pe32.dwSize = sizeof( PROCESSENTRY32 );
if( !Process32First( hProcessSnap, &pe32 ) )
{
CloseHandle( hProcessSnap ); // clean the snapshot object
return( 0 );
}
DWORD processId = 0;
do
{
if(std::wstring(pe32.szExeFile) == StringHelper::ANSIToUnicode(processName))//進程名稱
{
processId = pe32.th32ProcessID;//進程ID
break;
}
} while( Process32Next( hProcessSnap, &pe32 ) );
CloseHandle( hProcessSnap );
return( processId );
}
參考微軟最新的官網示例代碼:https://docs.microsoft.com/zh-cn/windows/win32/toolhelp/taking-a-snapshot-and-viewing-processes
之前網上的寫法不對,提前退出沒有關閉句柄,出了內存泄漏。導致拿到的內容也不對,是上次歷史的快照。