Wallpaper und Windows 8+

[KodeZwerg]

so habe ich es nun. in der hoffnung das alles korrekt ist widme ich mich nun tests.

Delphi-Quellcode:

function GetTranscodedImageCache: WideString;
const
  CDataValue: string = 'TranscodedImageCache';
  CKeyName: string = 'Control Panel\Desktop\';
var
  regist: TRegistry;
  KeyExists: Boolean;
  vSize, i: Integer;
  tmpStr: WideString;
begin
  Result := '';
  regist := TRegistry.Create(KEY_READ);
  try
    regist.RootKey := HKEY_CURRENT_USER;
    try
      KeyExists := regist.OpenKey(CKeyName, false);
      if (KeyExists) then
      begin
        regist.Access := KEY_READ;
        vSize := regist.GetDataSize(CDataValue);
        if (vSize > 0) then
        begin
          tmpStr := '';
          SetLength(tmpStr, vSize div 2);
          regist.ReadBinaryData(CDataValue, tmpStr[1], vSize);
          Delete(tmpStr,1,12);
          for i := 1 to length(tmpStr)-1 do
            if ( (tmpStr[i]=Char(#0)) and (tmpStr[i+1]=Char(#0)) ) then
             begin
               Delete(tmpStr, i, Length(tmpStr));
               Break;
             end;
          Result := tmpStr;
        end;
        regist.CloseKey;
      end;
    except
      regist.CloseKey;
    end
  finally
    regist.Free;
  end;
end;

function GetWallpaperBitmap: String;
const
  SPI_GETDESKWALLPAPER = $0073;
var
  wpFName: array [0..MAX_PATH] of Char;
begin
  if SystemParametersInfo(SPI_GETDESKWALLPAPER, MAX_PATH, @wpFName, 0)
    then Result := String(wpFName)
    else Result := '';
end;

function GetWallpaperFilename: String;
var
  tmpStr: String;
begin
  tmpStr := GetWallpaperBitmap;
  if Pos('TranscodedWallpaper',tmpStr) > 0 then
  Result := GetTranscodedImageCache
  else Result := tmpStr;
end;