Verificar que programas estã na memoria

Function EnumWindowsProc (Wnd: HWND; lb: TListbox): BOOL; stdcall;
// listbox1.clear;
// EnumWindows( @EnumWindowsProc, integer(listbox1));
var
caption: Array [0..128] of Char;
begin
Result := True;
if IsWindowVisible(Wnd) and ((GetWindowLong(Wnd, GWL_HWNDPARENT) = 0) or
(HWND(GetWindowLong(Wnd, GWL_HWNDPARENT)) = GetDesktopWindow)) and
((GetWindowLong(Wnd, GWL_EXSTYLE) and WS_EX_TOOLWINDOW) = 0) then
begin
SendMessage( Wnd, WM_GETTEXT, Sizeof( caption ),integer(@caption));
lb.Items.AddObject( caption, TObject( Wnd ));
end;
end;