Unable to register the DLL/OCX: RegSvr32 failed with exit code 0x3

hello guys..

i am trying to deploy my program using Inno Setup.
and it works fine in any Windows XP computers but
in Window7 i got this error

Unable to register the DLL/OCX: RegSvr32 failed with exit code 0x3

in the following files
C:\Windows\system32\msadox.dll
C:\Windows\system32\msado15.dll

thanks.

These libraries were never meant for individual redistribution anyway.

And in any case they've been included as parts of the OS since Windows 2000 SP2 or so, and are serviced via Windows Update. So you don't need to try to install these at all and shouldn't because each Windows version gets tailored code for the specific OS. You risk breaking the user's computer by trying this.


Win9x is another story, and to support those old OSs you need to deploy the MDAC_TYP.exe package and possibly DCOM95/DCOM98.

As you have been told, you probably shouldn't have to register these libraries. That being said, are you trying to register them on a 64 bit system? If so are you RegSvr32.exe from the C:\Windows\SysWOW64 directory?

They are probably native dlls and not activeX dlls that's why.

FYI, on a 64-bit machine, 32 bit binaries are stored in SysWOW64, and 64 bit binaries are stored in system32 (yes, this is confusing). The file system also redirects calls from Windows\system32 to Windows\SysWOW64 sometimes as described here. This may or may not be helpful in your particular case, but it's good to know.