Question about the getUserRegistryProductRootKey function

7598165 — Fri, 08 Aug 2025 20:34:54 GMT

int ArxGetProductKey() { #if (ADS > 18) const ACHAR* pRegKey = acdbHostApplicationServices()->getUserRegistryProductRootKey(); #else const ACHAR* pRegKey = acdbHostApplicationServices()->getRegistryProductRootKey(); #endif ads_retstr(pRegKey); adsout << "\nkey=" << pRegKey; return RSRSLT; }

Including acdbHostApplicationServices()->getMachineRegistryProductRootKey();

The above function will retrieve a value such as:
"Software\\Autodesk\\AutoCAD\\R24.1\\ACAD-5101:409"

However, if I want to obtain the function pointer from within AcDb24.dll,

c:\Program Files\Autodesk\AutoCAD 2022>dumpbin /exports acdb24.dll | findstr RootKey 9836 2660 001A5A14 ?getMachineRegistryProductRootKey@AcDbHostApplicationServices@@UEAAPEB_WXZ 10512 2904 001A5A14 ?getUserRegistryProductRootKey@AcDbHostApplicationServices@@UEAAPEB_WXZ

typedef const ACHAR* (*PFN_getUserRegistryProductRootKey)(); const ACHAR* GetUserRegistryProductRootKey() { const char* mangledName = "?getUserRegistryProductRootKey@AcDbHostApplicationServices@@UEAAPEB_WXZ"; const wchar_t* dllName = L"ACDB24.dll"; HMODULE hMod = GetModuleHandleW(dllName); if (!hMod) hMod = LoadLibraryW(dllName); if (!hMod) return nullptr; PFN_getUserRegistryProductRootKey pfnGetKey = (PFN_getUserRegistryProductRootKey)GetProcAddress(hMod, mangledName); if (!pfnGetKey) return nullptr; return pfnGetKey(); }

The result obtained from the above function is actually: SOFTWARE\Autodesk\ObjectDBX\R24.1

Why is the result different?

For the second method, what name mangling should be used to get the correct value "Software\\Autodesk\\AutoCAD\\R24.1\\ACAD-5101:409"?

topic Question about the getUserRegistryProductRootKey function in ObjectARX Forum

Question about the getUserRegistryProductRootKey function