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POIDropTarget::Drop method Hooking
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copied!<p>I am trying to hook IDropTarget::Drop COM method but i am not, before this i was hooking the IFileOperation::RenameItems Method it is working fine and for RenameItems hooking i used the following code ..</p> <pre><code>#include "stdafx.h" #include <windows.h> #include "MinHook.h" #include <Winternl.h> #include <stdio.h> #include <shlwapi.h> #include <tchar.h> #include <string.h> #include <psapi.h> #include <strsafe.h> #include <Shobjidl.h> #include <Shellapi.h> #include <Shlguid.h> #if defined _M_X64 #pragma comment(lib, "libMinHook.x64.lib") bool __is32bitMachine = false ; #elif defined _M_IX86 #pragma comment(lib, "libMinHook.x86.lib") bool __is32bitMachine = true; #endif PVOID GetInterfaceMethod(PVOID intf, DWORD methodIndex) { if (__is32bitMachine) return *(PVOID*)(*(DWORD_PTR*)intf + methodIndex * 4); else return *(PVOID*)(*(DWORD_PTR*)intf + methodIndex * 8); } typedef HRESULT (STDMETHODCALLTYPE *RenameItemsNext)(IFileOperation *pThis, IUnknown *pUnkItems, LPCWSTR pszNewName); RenameItemsNext Real_RenameItems = NULL; RenameItemsNext Actual_RenameItems ; HRESULT STDMETHODCALLTYPE RenameItemsCallback(IFileOperation *pThis, IUnknown *pUnkItems, LPCWSTR pszNewName) { IID IID_ShellItemArray; IID IID_DataObject; CLSIDFromString(L"{b63ea76d-1f85-456f-a19c-48159efa858b}", &IID_ShellItemArray); CLSIDFromString(L"{0000010E-0000-0000-C000-000000000046}", &IID_DataObject); void *shellItemArray; void *dataObject; LPWSTR dstFN; if (pUnkItems->QueryInterface(IID_ShellItemArray, &shellItemArray) == S_OK) { DWORD numItems = 0; IShellItem *shell; IShellItemArray *pItems = (IShellItemArray *) pUnkItems; pItems->GetCount(&numItems); for (int i = 0; i < numItems; i++) { pItems->GetItemAt(i, &shell); shell->GetDisplayName(SIGDN_FILESYSPATH, &dstFN); MessageBoxW(NULL, dstFN, L"Renamed From", MB_OK); } MessageBoxW(NULL, pszNewName, L"Renamed To", MB_OK); } if (pUnkItems->QueryInterface(IID_DataObject, &dataObject) == S_OK) { Real_SHCreateShell = (SHCreateShellNext)GetProcAddress(LoadLibraryA("shell32.dll"), "SHCreateShellItemArrayFromDataObject"); if (Real_SHCreateShell != NULL) { if (Real_SHCreateShell((IDataObject*)dataObject, IID_ShellItemArray, &shellItemArray) == S_OK) { DWORD numItems = 0; IShellItem *shell; IShellItemArray *pItems = (IShellItemArray *)shellItemArray; pItems->GetCount(&numItems); if (pItems->GetCount(&numItems) == S_OK) { for (int i = 0; i < numItems; i++) { if (pItems->GetItemAt(i, &shell) == S_OK) { shell->GetDisplayName(SIGDN_FILESYSPATH, &dstFN); MessageBoxW(NULL, dstFN, L"Renamed From", MB_OK); } } } } } MessageBoxW(NULL, dstFN, L"Renamed To", MB_OK); } return Real_RenameItems(pThis, pUnkItems, pszNewName); } typedef HRESULT (WINAPI *COCREATEINSTANCE)(REFCLSID, LPUNKNOWN, DWORD, REFIID, LPVOID*); COCREATEINSTANCE Real_CoCreateInstance = NULL; HRESULT WINAPI CoCreateInstanceCallback(REFCLSID rclsid, LPUNKNOWN pUnkOuter, DWORD dwClsContext, REFIID riid, LPVOID *ppv) { const char *IFileOperation_GUID = "{3AD05575-8857-4850-9277-11B85BDB8E09}"; char GUIDString[64]; HRESULT HR = Real_CoCreateInstance(rclsid, pUnkOuter, dwClsContext, riid, ppv); sprintf_s(GUIDString, 64, "{%08X-%04X-%04X-%02X%02X-%02X%02X%02X%02X%02X%02X}\0", rclsid.Data1, rclsid.Data2, rclsid.Data3, rclsid.Data4[0], rclsid.Data4[1], rclsid.Data4[2], rclsid.Data4[3], rclsid.Data4[4], rclsid.Data4[5], rclsid.Data4[6], rclsid.Data4[7]); if (strcmp(GUIDString, IFileOperation_GUID) == 0) { if(Real_RenameItems == NULL) { Actual_RenameItems = (RenameItemsNext) GetInterfaceMethod(*ppv, 13); if (MH_CreateHook(Actual_RenameItems, &RenameItemsCallback, reinterpret_cast<void**>(&Real_RenameItems)) != MH_OK) { MessageBoxW(NULL, L"Failed CreateHook Real_RenameItems", L"Info!", MB_ICONWARNING|MB_OK); } if (MH_EnableHook(Actual_RenameItems) != MH_OK) { MessageBoxW(NULL, L"Failed EnableHook Real_RenameItems", L"Info!", MB_ICONWARNING|MB_OK); } } } return HR; } BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) { switch (ul_reason_for_call) { case DLL_PROCESS_ATTACH: if (MH_Initialize() != MH_OK) { MessageBoxW(NULL, L"Failed Initialize", L"Info!", MB_ICONWARNING|MB_OK); } if (MH_CreateHook(&CoCreateInstance, &CoCreateInstanceCallback, reinterpret_cast<void**>(&Real_CoCreateInstance)) != MH_OK) { MessageBoxW(NULL, L"Failed MH_CreateHook CoCreateInstance", L"Info!", MB_ICONWARNING|MB_OK); } if (MH_EnableHook(&CoCreateInstance) != MH_OK) { MessageBoxW(NULL, L"Failed MH_EnableHook CoCreateInstance", L"Info!", MB_ICONWARNING|MB_OK); } break; case DLL_PROCESS_DETACH: if (MH_Uninitialize() != MH_OK) { } if (MH_DisableHook(Actual_RenameItems) != MH_OK) { } if (MH_DisableHook(&CoCreateInstance) != MH_OK) { } break; } return TRUE; } </code></pre> <p>The above code is working fine for IOFileOperation::RenameItems and i am trying to implement the same code for IDropTarget::Drop Method but what is happening is the CoCreateInstance Function itself is not calling for Drop operation , so can any help me how to implement this IDropTarget::Drop Hooking .......</p>

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