windows desktop new folder c++ - winapi

Question

Purpose :
New folder creation function in Windows Explorer (Desktop)
(Icon coordinate setting + label correction)
I am wondering how to create a new folder like Windows Explorer (Desktop).
I want to know the same function as "Right click on desktop → New → Folder".
What I want is to make it to specific coordinates.
++ It would be better if you could also modify the label.
This is how I did it.
CreateDirectory → FindWindow (Desktop Listview) → SendMessage (LVM_SETITEMPOSITION)
But when I do CreateDirectory it appears too slow on the desktop.
(Default 1000ms or more)
So I tried SHChangeNotify but it appears slow.
That source code functions to move the mouse to a specific location on the desktop and press a shortcut to create a folder with that coordinate.
However, I can see the folder appearing slow and moving (SendMessage (LVM_SETITEMPOSITION)).
// this is Console Application
HWND hDesk = FindWindow(NULL, L"Program Manager");
HWND hDesk2 = FindWindowEx(hDesk, NULL, L"SHELLDLL_DefView", NULL);
HWND hListView = FindWindowEx(hDesk2, NULL, L"SysListView32", NULL);
int iconCount = (int)SendMessage(hListView, LVM_GETITEMCOUNT, NULL, NULL);
printf("컨트롤(Control) + F2\n");
RegisterHotKey(NULL, 1, MOD_CONTROL, VK_F2);
MSG msg;
while (GetMessage(&msg, 0, 0, 0))
{
PeekMessage(&msg, 0, 0, 0, 0x0001);
switch (msg.message)
{
case WM_HOTKEY:
if (msg.wParam == 1)
{
printf("ㅇㅋ 누름 (Hotkey Event)\n");
int a = SendMessage(hListView, LVM_GETITEMCOUNT, 0, 0);
int b;
int ms = GetTickCount();
CreateDirectory(L"C:\\Users\\root\\Desktop\\new Folder", NULL);
//SendMessage(hListView, LVM_REDRAWITEMS, 0, a+5);
//SendMessage(hListView, LVM_UPDATE, a, 0);
//SHChangeNotify(SHCNE_MKDIR, SHCNF_IDLIST| SHCNF_PATHW, L"C:\\Users\\root\\Desktop", NULL);
while (true)
{
b = SendMessage(hListView, LVM_GETITEMCOUNT, 0, 0);
if (a != b) {
ms = GetTickCount() - ms;
break;
}
}
Sleep(1);
POINT mouse;
GetCursorPos(&mouse);
SendMessage(hListView, LVM_SETITEMPOSITION, b - 1, MAKEWPARAM(mouse.x, mouse.y));
SendMessage(hListView, LVM_EDITLABEL, b - 1, 0);
}
}
}
I thought CreateDirectory was the problem and tried to create a directory using NtCreateFile (User Space / Ring3), but it is still slow.
The icon still appears slow on the desktop.
Is there WinAPI / DesktopAPI / COM / ATL for this?

Answer 1

Here is a code that simulates what's the New... Folder menu does from a Console Application.
It opens a view on some folder and create a child folder in it, and enter name edit mode. It's using the Shell's IFileOperation interface and also ATL's smart pointers only for simplicity.
int main()
{
CoInitialize(NULL);
{
CComHeapPtr<ITEMIDLIST> pidl;
CComHeapPtr<ITEMIDLIST> newFolderPidl;
CComPtr<IFileOperationProgressSink> sink;
CComPtr<IFileOperation> fo;
CComPtr<IShellItem> folder;
LPCITEMIDLIST pidls = { nullptr };
CFileOperationProgressSink csink;
// get some folder's PIDL
HRESULT hr = SHParseDisplayName(L"c:\\temp", NULL, &pidl, 0, NULL);
if (SUCCEEDED(hr))
{
// open it and, for demo purposes here, selects nothing (pass a terminator PIDL)
ITEMIDLIST idl = { 0 };
pidls = { &idl };
hr = SHOpenFolderAndSelectItems(pidl, 1, &pidls, 0);
if (SUCCEEDED(hr))
{
// get a Shell Item from this PIDL
hr = SHCreateItemFromIDList(pidl, IID_PPV_ARGS(&folder));
}
}
if (SUCCEEDED(hr))
{
// we want to operate on files and directory using Shell's API
hr = fo.CoCreateInstance(CLSID_FileOperation);
if (SUCCEEDED(hr))
{
csink.QueryInterface(IID_PPV_ARGS(&sink));
// create the new folder "New Folder", using the sink
// we need a sink to be advised of what really is the new folder
// we can't use the name we've passed
// because it could have been changed like 'New Folder (2)' if there's already a 'New Folder', etc.
hr = fo->NewItem(folder, FILE_ATTRIBUTE_DIRECTORY, L"New Folder", NULL, sink);
if (SUCCEEDED(hr))
{
// commit
hr = fo->PerformOperations();
}
}
}
if (SUCCEEDED(hr))
{
// we want the new child's relative-to-the-parent PIDL
CComPtr<IParentAndItem> pai;
hr = csink.m_newItem->QueryInterface(&pai);
if (SUCCEEDED(hr))
{
hr = pai->GetParentAndItem(NULL, NULL, &newFolderPidl);
}
}
if (SUCCEEDED(hr))
{
// now, select the new child and get into name-edit mode (from the parent again)
pidls = { newFolderPidl };
hr = SHOpenFolderAndSelectItems(pidl, 1, &pidls, OFASI_EDIT);
}
}
CoUninitialize();
return 0;
}
// the sink. this implementation's only interested by PostNewItem
class CFileOperationProgressSink : public IFileOperationProgressSink
{
LONG m_cRef;
public:
CComPtr<IShellItem> m_newItem;
CFileOperationProgressSink() : m_cRef(1)
{
}
STDMETHOD(QueryInterface)(REFIID riid, void** ppv)
{
static const QITAB qit[] =
{
QITABENT(CFileOperationProgressSink, IFileOperationProgressSink),
{ 0 },
};
return QISearch(this, qit, riid, ppv);
}
STDMETHOD_(ULONG, AddRef)() { return InterlockedIncrement(&m_cRef); }
STDMETHOD_(ULONG, Release)()
{
if (InterlockedDecrement(&m_cRef))
return m_cRef;
delete this;
return 0;
}
STDMETHOD(StartOperations)() { return S_OK; };
STDMETHOD(FinishOperations)(HRESULT hrResult) { return S_OK; };
STDMETHOD(PreRenameItem)(DWORD dwFlags, IShellItem* psiItem, LPCWSTR pszNewName) { return S_OK; };
STDMETHOD(PostRenameItem)(DWORD dwFlags, IShellItem* psiItem, LPCWSTR pszNewName, HRESULT hrRename, IShellItem* psiNewlyCreated) { return S_OK; };
STDMETHOD(PreMoveItem)(DWORD dwFlags, IShellItem* psiItem, IShellItem* psiDestinationFolder, LPCWSTR pszNewName) { return S_OK; };
STDMETHOD(PostMoveItem)(DWORD dwFlags, IShellItem* psiItem, IShellItem* psiDestinationFolder, LPCWSTR pszNewName, HRESULT hrMove, IShellItem* psiNewlyCreated) { return S_OK; };
STDMETHOD(PreCopyItem)(DWORD dwFlags, IShellItem* psiItem, IShellItem* psiDestinationFolder, LPCWSTR pszNewName) { return S_OK; };
STDMETHOD(PostCopyItem)(DWORD dwFlags, IShellItem* psiItem, IShellItem* psiDestinationFolder, LPCWSTR pszNewName, HRESULT hrCopy, IShellItem* psiNewlyCreated) { return S_OK; };
STDMETHOD(PreDeleteItem)(DWORD dwFlags, IShellItem* psiItem) { return S_OK; };
STDMETHOD(PostDeleteItem)(DWORD dwFlags, IShellItem* psiItem, HRESULT hrDelete, IShellItem* psiNewlyCreated) { return S_OK; };
STDMETHOD(PreNewItem)(DWORD dwFlags, IShellItem* psiDestinationFolder, LPCWSTR pszNewName) { return S_OK; };
STDMETHOD(PostNewItem)(DWORD dwFlags, IShellItem* psiDestinationFolder, LPCWSTR pszNewName, LPCWSTR pszTemplateName, DWORD dwFileAttributes, HRESULT hrNew, IShellItem* psiNewItem)
{
if (SUCCEEDED(hrNew))
{
psiNewItem->QueryInterface(&m_newItem);
}
return S_OK;
}
STDMETHOD(UpdateProgress)(UINT iWorkTotal, UINT iWorkSoFar) { return S_OK; };
STDMETHOD(ResetTimer)() { return S_OK; };
STDMETHOD(PauseTimer)() { return S_OK; };
STDMETHOD(ResumeTimer)() { return S_OK; };
};