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uses  
  Tlhelp32; 

function KillTask(ExeFileName: string): integer; 
const 
  PROCESS_TERMINATE=$0001;  
var 
  ContinueLoop: BOOL; 
  FSnapshotHandle: THandle; 
  FProcessEntry32: TProcessEntry32;  
begin 
  result := 0;  

  FSnapshotHandle := CreateToolhelp32Snapshot 
                     (TH32CS_SNAPPROCESS, 0);  
  FProcessEntry32.dwSize := Sizeof(FProcessEntry32); 
  ContinueLoop := Process32First(FSnapshotHandle,  
                                 FProcessEntry32); 

  while integer(ContinueLoop) <> 0 do 
  begin 
    if ((UpperCase(ExtractFileName(FProcessEntry32.szExeFile)) = 
         UpperCase(ExeFileName)) 
     or (UpperCase(FProcessEntry32.szExeFile) = 
         UpperCase(ExeFileName))) then 
      Result := Integer(TerminateProcess(OpenProcess( 
                        PROCESS_TERMINATE, BOOL(0), 
                        FProcessEntry32.th32ProcessID), 0));  
    ContinueLoop := Process32Next(FSnapshotHandle, 
                                  FProcessEntry32); 
  end;  

  CloseHandle(FSnapshotHandle);  
end; 



procedure TForm1.Button1Click(Sender: TObject); 
begin 
  KillTask('notepad.exe'); 
end;                    

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interface 
uses 
 {...,}TLHelp32 {important !} 

// Global Variables, Globale Variablen 

VAR aSnapshotHandle : THandle; 
    aProcessEntry32 : TProcessEntry32; 

procedure TFormMain.BtnRefreshClick(Sender: TObject); 
var i       : integer; 
    bLoop   : BOOL; 
    NewItem : TListItem; 
begin 
  ListView.Items.Clear; 
  aSnapshotHandle:=CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0); 
  aProcessEntry32.dwSize:=Sizeof(aProcessEntry32); 
  bLoop:=Process32First(aSnapshotHandle,aProcessEntry32); 
  while integer(bLoop) <>0 do 
  begin 
    NewItem:=ListView.Items.add; 
    NewItem.Caption:=ExtractFileName(aProcessEntry32.szExeFile); 
    NewItem.subItems.Add(IntToHex(aProcessEntry32.th32ProcessID,4)); 
    NewItem.subItems.Add(aProcessEntry32.szExeFile); 
    ContinueLoop:=Process32Next(aSnapshotHandle,aProcessEntry32); 
  end; 
  CloseHandle(aSnapshotHandle); 
end; 

procedure TFormMain.ListViewDblClick(Sender: TObject); 
var  Ret : BOOL; 
     PrID : integer; //processidentifier 
     Ph : THandle;  //processhandle 
begin 
  try 
    with ListView do 
    begin 
      if MessageDlg('Do you want to Terminate "'+ItemFocused.Caption+'"?'+^J+ 
                    'posible the system is instabile or out of'+^J+ 
                    'control......', 
          mtConfirmation,[mbYes,mbNo],0)=mrYes then 
       begin 
         PrID:=StrToInt('$'+ItemFocused.SubItems[0]); 
         Ph:=OpenProcess(1,BOOL(0),PrID); 
         Ret:=TerminateProcess(Ph,0); 
         if Integer(Ret)=0 Then 
           MessageDlg('Can Not Terminate "'+ItemFocused.Caption+'"',mtInformation,[mbOk],0) 
         else 
           ItemFocused.Delete; 
       end; 
     end; 
   except 
   end; 
end; 

procedure TFormMain.FormCreate(Sender: TObject); 
begin 
  //Application.OnHint := DisplayHint;  //If you want/need it... 
  BtnRefreshClick(Sender); 
end;                    

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uses
  tlhelp32;

{******************************************************************************}
{**                                                                          **}
{** Prozesse in Stringliste schreiben                                        **}
{**                                                                          **}
{******************************************************************************}
procedure GetProcessList(sl: TStrings);
var
  hProcSnap: THandle;
  pe32: TProcessEntry32;
begin
  { Snapshot machen *PENG* }
  hProcSnap := CreateToolHelp32SnapShot(TH32CS_SNAPPROCESS, 0);
  if hProcSnap = INVALID_HANDLE_VALUE then exit;

  pe32.dwSize := SizeOf(ProcessEntry32);

  { wenn es geklappt hat }
  if Process32First(hProcSnap, pe32) = true then
    { und los geht's }
    { Process32First liefert auch schon einen Prozess, den System-Prozess }
    sl.Add(pe32.szExeFile);
    while Process32Next(hProcSnap, pe32) = true do
    begin
      sl.Add(pe32.szExeFile);
    end;
  CloseHandle(hProcSnap);
end;

{******************************************************************************}
{**                                                                          **}
{** ProzessID an Hand der Exe-Datei ermittlen                                **}
{**                                                                          **}
{******************************************************************************}
function GetProcessID(sProcName: String): Integer;
var
  hProcSnap: THandle;
  pe32: TProcessEntry32;
begin
  result := -1;
  hProcSnap := CreateToolHelp32SnapShot(TH32CS_SNAPPROCESS, 0);
  if hProcSnap = INVALID_HANDLE_VALUE then exit;

  pe32.dwSize := SizeOf(ProcessEntry32);

  { wenn es geklappt hat }
  if Process32First(hProcSnap, pe32) = true then
    { und los geht's: Prozess suchen}
    while Process32Next(hProcSnap, pe32) = true do
    begin
      if pos(sProcName, pe32.szExeFile) <> 0then
        result := pe32.th32ProcessID;
    end;
end;

{******************************************************************************}
{**                                                                          **}
{** Prozess beenden                                                          **}
{**                                                                          **}
{******************************************************************************}
procedure KillProcess(dwProcID: DWORD);
var
  hProcess : Cardinal;
  dw       : DWORD;
begin
  { open the process and store the process-handle }
  hProcess := OpenProcess(SYNCHRONIZE or PROCESS_TERMINATE, False, dwProcID);
  { kill it }
  TerminateProcess(hProcess, 0);
  { TerminateProcess returns immediately, so wie have to verify the result via
    WaitForSingleObject }
  dw := WaitForSingleObject(hProcess, 5000);
  case dw of
    { everythings's all right, we killed the process }
    WAIT_OBJECT_0: Messagebox(Application.Handle, 'Prozess wurde beendet.', 'Prozess beenden',
      MB_ICONINFORMATION);
    { process could not be terminated after 5 seconds }
    WAIT_TIMEOUT:
    begin
      Messagebox(Application.Handle, 'Prozess konnte nicht innerhalb von 5 Sekunden beendet werden.',
        'Prozess beenden', MB_ICONSTOP);
      exit;
    end;
    { error in calling WaitForSingleObject }
    WAIT_FAILED:
    begin
      RaiseLastOSError;
      exit;
    end;
  end;
  { and refresh listbox contend }
  Form1.Button1Click(Form1);
end;

{******************************************************************************}
{**                                                                          **}
{** Button zum Auflisten der Prozesse und in Listbox schreiben               **}
{**                                                                          **}
{******************************************************************************}
procedure TForm1.Button1Click(Sender: TObject);
begin
  Listbox1.Clear;
  GetProcessList(Listbox1.Items);
end;

{******************************************************************************}
{**                                                                          **}
{** Button zum Prozess beenden                                               **}
{**                                                                          **}
{******************************************************************************}
procedure TForm1.Button2Click(Sender: TObject);
begin
  KillProcess(GetProcessID(Listbox1.Items.Strings[Listbox1.ItemIndex]));
end;                    

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  KillProcess(GetProcessID('wmplayer.exe'));