Как обновить рабочий стол?
Материал из DRKB
Как обновить рабочий стол?[править | править код]
procedure RefreshDesktop;
var
c1 : cardinal;
begin
c1 := FindWindowEx(FindWindowEx(FindWindow('Progman', 'Program Manager'), 0, 'SHELLDLL_DefView', ''), 0, 'SysListView32', '');
PostMessage(c1, WM_KEYDOWN, VK_F5, 0);
PostMessage(c1, WM_KEYUP, VK_F5, 1 shl 31);
end;
Author: neutrino
Source: Взято с Vingrad.ru http://forum.vingrad.ru
ID: 01806
winexec(PChar('rundll32 user,repaintscreen' ), sw_Show);
Author: Radmin
Source: Взято с Vingrad.ru http://forum.vingrad.ru
ID: 01807
procedure TForm1.Button1Click(Sender: TObject);
begin
SendMessage(FindWindow('Progman', 'Program Manager'), WM_COMMAND, $A065, 0);
end;
Source: Взято из http://forum.sources.ru
ID: 01808
uses
ShlObj;
procedure RefreshDesktop1;
begin
SHChangeNotify(SHCNE_ASSOCCHANGED, SHCNF_IDLIST, nil, nil);
end;
Source: Взято с сайта: http://www.swissdelphicenter.ch
ID: 01809
Обновить иконки на экране[править | править код]
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
Language: en
Source: Взято с сайта: http://www.swissdelphicenter.ch
ID: 01810