delphi - How do I make the "show/hide desktop icons" setting take effect? -

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the code below calls shgetsetsettings function hide desktop icons unchecked "show desktop icons" view menu.

i called shchangenotify(shcne_assocchanged, shcnf_flushnowait, nil, nil); update desktop doesn't work?

var lpss: shellstate; begin   lpss.data := high(cardinal);   lpss.data2 := low(cardinal);   shgetsetsettings(lpss,ssf_hideicons,true);   shchangenotify(shcne_assocchanged, shcnf_flushnowait, nil, nil); end;

isa, refresh desktop can send f5 key progman (program manager) window

postmessage(findwindow('progman', nil), wm_keydown, vk_f5, 3);

another alternative hide desktop icons 

showwindow(findwindow('progman', nil),sw_hide); //hide icons desktop , refresh screen

to show again

showwindow(findwindow('progman', nil),sw_show); //show icons of desktop , refresh

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