Hey I tried adding a DLL file in Windows 7 by copying to system32 folder. How to register a DLL file in Windows 7?. \Windows\SysWOW64\StrmExt_x64.dll Registering DLL and OCX files. To register the DLL or OCX files in MS Windows 7. regsvr32 c:\windows\ syswow64\ msflxgrd.ocx. Wow64.dll beinhaltet die. Bei der Ausführung von 32-Bit-Anwendungen werden Zugriffe auf Bibliotheken aus diesem Verzeichnis nach %SystemRoot%\SysWOW64. Windows. Register 32 bit COM DLL to 64 bit Windows 7. Copy whatever.dll to c:\windows\sysWOW64\. regsvr32 lib_x86.dll fails to register library. hi. If you want to register a 32 dll in 64 bit machine then you should try using C:\Windows\SysWOW64\regsvr32.exe In 64 bit machine C:\windows\system32. I have tried to use the following code: cd c:\windows\system32 regsvr32.exe dllname.ax But this is not working for me. How can I register a DLL file on Windows 7 with. DLL file in Windows using Regsvr32 command. window and to register all your dll files on a 64 bit system copy and paste this line carefully in cmd window. %a. How to register.dll and.ocx files RO. Unregister or Register DLL or OCX files in Windows 7. \Windows\SysWow64 including subfolders, C. \Windows\SysWOW64 should register it. Incidentally I had a problem at first registering a VB6 dll under 64 bit windows 7 using the sysWOW64 version. 4.2 64-Bit Windows 7 Register Files Instructions. In the text box, paste regsvr32 C:\Windows\SysWOW64\msstdfmt.dll. (Make sure you include the quotes.).