function CheckTask(ExeFileName: string): Boolean;
const
PROCESS_TERMINATE=$0001;
var
ContinueLoop: BOOL;
FSnapshotHandle: THandle;
FProcessEntry32: TProcessEntry32;
begin
result := False;
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 := True;
      ContinueLoop := Process32Next(FSnapshotHandle,FProcessEntry32);
end;
end;

function KillTask(ExeFileName:string):integer;
const 
PROCESS_TERMINATE = $0001; 
var
ContinueLoop: BOOLean;
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
 if CheckTask(’qq.exe’)=true then
KillTask(’qq.exe’)
else
Label1.Caption:=’进程不存在，监视中...’;
end;
procedure TForm1.Timer1Timer(Sender: TObject);
begin
 if CheckTask(’qq.exe’)=true then
Label1.Caption:=’进程正在运行中...’
else
Label1.Caption:=’进程不存在，监视中...’;
end;