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DRKB - это самая большая и удобная в использовании база знаний по Дельфи в рунете, составленная Виталием Невзоровым

Как обновить рабочий стол?

01.01.2007
procedure RefreshDesktop;

 
var
  c1
: cardinal;
begin
c1
:=FindWindowEx(FindWindowEx(FindWindow('Progman','Program Manager'),,'SHELLDLL_DefView',''),0,'SysListView32','');
PostMessage(c1,WM_KEYDOWN,VK_F5,0);
PostMessage(c1,WM_KEYUP,VK_F5,1 shl 31);
end;

Автор: neutrino

Взято с Vingrad.ru https://forum.vingrad.ru


winexec(Pchar( 'rundll32 user,repaintscreen' ),sw_Show);

Автор: Radmin

Взято с Vingrad.ru https://forum.vingrad.ru


procedure TForm1.Button1Click(Sender: TObject); 
begin
 
SendMessage(FindWindow('Progman', 'Program Manager'),
              WM_COMMAND
,
              $A065
,
             
0);
end;

Взято из https://forum.sources.ru


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

Взято с сайта: https://www.swissdelphicenter.ch


Обновить иконки на экране

{ 
 
Microsoft's Tweak UI has a feature 'rebuild icon cache now'.
  Windows then rebuilds its internal cache of icons.
  Unfortunately, there is no single API to do this.
}
 
 uses
   Registry;
 
 function RefreshScreenIcons : Boolean;
 const
   KEY_TYPE = HKEY_CURRENT_USER;
   KEY_NAME = '
Control Panel\Desktop\WindowMetrics';
   KEY_VALUE = '
Shell Icon Size';
 var
   Reg: TRegistry;
   strDataRet, strDataRet2: string;
 
  procedure BroadcastChanges;
  var
    success: DWORD;
  begin
    SendMessageTimeout(HWND_BROADCAST,
                       WM_SETTINGCHANGE,
                       SPI_SETNONCLIENTMETRICS,
                       0,
                       SMTO_ABORTIFHUNG,
                       10000,
                       success);
  end;
 
 
 begin
   Result := False;
   Reg := TRegistry.Create;
   try
     Reg.RootKey := KEY_TYPE;
     // 1. open HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics
    if Reg.OpenKey(KEY_NAME, False) then
     begin
       // 2. Get the value for that key
      strDataRet := Reg.ReadString(KEY_VALUE);
       Reg.CloseKey;
       if strDataRet <> '' then
       begin
         // 3. Convert sDataRet to a number and subtract 1,
        //    convert back to a string, and write it to the registry
        strDataRet2 := IntToStr(StrToInt(strDataRet) - 1);
         if Reg.OpenKey(KEY_NAME, False) then
         begin
           Reg.WriteString(KEY_VALUE, strDataRet2);
           Reg.CloseKey;
           // 4. because the registry was changed, broadcast
          //    the fact passing SPI_SETNONCLIENTMETRICS,
          //    with a timeout of 10000 milliseconds (10 seconds)
          BroadcastChanges;
           // 5. the desktop will have refreshed with the
          //    new (shrunken) icon size. Now restore things
          //    back to the correct settings by again writing
          //    to the registry and posing another message.
          if Reg.OpenKey(KEY_NAME, False) then
           begin
             Reg.WriteString(KEY_VALUE, strDataRet);
             Reg.CloseKey;
             // 6.  broadcast the change again
            BroadcastChanges;
             Result := True;
           end;
         end;
       end;
     end;
   finally
     Reg.Free;
   end;
 end;
 
 procedure TForm1.Button1Click(Sender: TObject);
 begin
   RefreshScreenIcons
 end;
 
 
 {
  The result is Window'
s erasing all its icons, and recalculating them
  based on the registry settings
.
 
This means if you have changed a DefaultIcon key within the registry for
  some application
or file, Windows will display the new icon when the
  refresh
is completed.
 
 
Original source:
  www
.mvps.org/vbnet/index.html?code/reg/screenrefresh.htm
 
Translated from VB by Thomas Stutz
}

Взято с сайта: https://www.swissdelphicenter.ch