refresh the desktop

uses
ShlObj;

procedure RefreshDesktop1;
begin
SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, nil, nil);
end;

{2.}

procedure RefreshDesktop2;
var
hDesktop: HWND;
begin
hDesktop := FindWindowEx(FindWindowEx(FindWindow('Progman', 'Program Manager'), 0,
'SHELLDLL_DefView', ''), 0, 'SysListView32', '');
PostMessage(hDesktop, WM_KEYDOWN, VK_F5, 0);
PostMessage(hDesktop, WM_KEYUP, VK_F5, 1 shl 31);
end;