来源: http://www.delphitricks.com/source-code/windows/check_if_a_process_is_running.html
uses TlHelp32;
function processExists(exeFileName: string): Boolean;
var
ContinueLoop: BOOL;
FSnapshotHandle: THandle;
FProcessEntry32: TProcessEntry32;
begin
FSnapshotHandle := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
FProcessEntry32.dwSize := SizeOf(FProcessEntry32);
ContinueLoop := Process32First(FSnapshotHandle, FProcessEntry32);
Result := False;
while Integer(ContinueLoop) <> 0 do
begin
if ((UpperCase(ExtractFileName(FProcessEntry32.szExeFile)) =
UpperCase(ExeFileName)) or (UpperCase(FProcessEntry32.szExeFile) =
UpperCase(ExeFileName))) then
begin
Result := True;
end;
ContinueLoop := Process32Next(FSnapshotHandle, FProcessEntry32);
end;
CloseHandle(FSnapshotHandle);
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
if processExists('notepad.exe') then
ShowMessage('process is running')
else
ShowMessage('process not running');
end;
uses TlHelp32, PsAPI;
function ProcessExists(anExeFileName: string): Boolean;
var
ContinueLoop: BOOL;
FSnapshotHandle: THandle;
FProcessEntry32: TProcessEntry32;
fullPath: string;
myHandle: THandle;
myPID: DWORD;
begin
// wsyma 2016-04-20 Erkennung, ob ein Prozess in einem bestimmten Pfad schon gestartet wurde.
// Detection wether a process in a certain path is allready started.
// https://dev59.com/fXNA5IYBdhLWcg3wpvtg
// http://swissdelphicenter.ch/en/showcode.php?id=2010
FSnapshotHandle := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
FProcessEntry32.dwSize := SizeOf(FProcessEntry32);
ContinueLoop := Process32First(FSnapshotHandle, FProcessEntry32);
Result := False;
while Integer(ContinueLoop) <> 0 do
begin
if UpperCase(ExtractFileName(FProcessEntry32.szExeFile)) = UpperCase(ExtractFileName(anExeFileName)) then
begin
myPID := FProcessEntry32.th32ProcessID;
myHandle := OpenProcess(PROCESS_QUERY_INFORMATION or PROCESS_VM_READ, False, myPID);
if myHandle <> 0 then
try
SetLength(fullPath, MAX_PATH);
if GetModuleFileNameEx(myHandle, 0, PChar(fullPath), MAX_PATH) > 0 then
begin
SetLength(fullPath, StrLen(PChar(fullPath)));
if UpperCase(fullPath) = UpperCase(anExeFileName) then
Result := True;
end else
fullPath := '';
finally
CloseHandle(myHandle);
end;
if Result then
Break;
end;
ContinueLoop := Process32Next(FSnapshotHandle, FProcessEntry32);
end;
CloseHandle(FSnapshotHandle);
end;
// Add this into the application you wish to update
CreateFileMapping(HWND($FFFFFFFF), nil, PAGE_READONLY, 0, 32, 'MAIN-PROGRAM');
// Note: Mapping object is destroyed when your application exits
// Add this into your updater application
var
hMapping: HWND;
begin
hMapping := CreateFileMapping(HWND($FFFFFFFF), nil, PAGE_READONLY, 0, 32, 'MAIN-PROGRAM');
if (hMapping <> 0) then
begin
if (GetLastError() = ERROR_ALREADY_EXISTS) then
ShowMessage('Application to update is already running!');
end;
请查看MSDN文档中CreateFileMapping的详细信息。
另请参阅此问题的最佳答案,其中涵盖了Luke的回答并提供了其他解决方案。
initialization
mHandle := CreateMutex(nil, True, 'myApp.ts');
if GetLastError = ERROR_ALREADY_EXISTS then
begin
MessageDlg('Program already running!', mtError, [mbOK], 0);
Halt;
end;
function ProcessRunning(ExeFileName: string): Boolean;
var
SnapshotHandle: THandle;
Process: TProcessEntry32;
begin
Result := FALSE;
ExeFileName:= LowerCase(ExeFileName);
SnapshotHandle:= CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
TRY
Process.dwSize := SizeOf(Process);
if Process32First(SnapshotHandle, Process) then
REPEAT
VAR LowProcName:= LowerCase(Process.szExeFile);
if (LowProcName = ExeFileName)
OR (LowProcName = ExtractFileName(ExeFileName))
then EXIT(True);
UNTIL NOT Process32Next(SnapshotHandle, Process);
FINALLY
CloseHandle(SnapshotHandle);
END;
end;