问题
I am currently trying to retrieve the list of icons from my desktop to change their locations and / or hide them as well as display others.
I tried to get the FolderView in the code below but it doesn't even show the number of icons I have on the desktop because count return 0.
HWND hDesktop = GetDesktopWindow();
HWND hDefView = FindWindowEx(hDesktop, NULL, L"SHELLDLL_DefView", NULL);
HWND folderView = FindWindowEx(hShellWnd, NULL, L"SysListView32", NULL);
int count = (int) SendMessage(folderView, LVM_GETITEMCOUNT, 0, 0);
cout << count << endl;
I did tests on the variables and is noticed that hDefView is NULL.
Probably the reason why count return 0.
EDIT : After replace GetDesktopWindow by GetShellWindow the result is always the same, 0
回答1:
The shell window hierarchy is not documented nor stable. "ProgMan" is usually the parent of "SHELLDLL_DefView" but if you change to slideshow wallpaper it can also be "WorkerW".
It is much better to inspect/manipulate the desktop with the documented shell COM interfaces: IShellWindows, IShellBrowser, IFolderView and IShellFolder.
来源：https://stackoverflow.com/questions/49964260/manipulating-the-positions-of-desktop-icons