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KillTask('notepad.exe');
KillTask('iexplore.exe');

//*-*-*-*-*

uses
  Tlhelp32, Windows, SysUtils;

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;