To enumerate and show the 32 bit OLE DB providers, perform the following steps:
1. Create a UDL file with the name test.udl under the path, C:\.
2. To list the 32-bit OLE DB providers installed on a 64 bit operating system, run the below command on Command Line.
C:\Windows\SysWOW64\rundll32.exe "C:\Program Files (x86)\Common Files\System\Ole DB\oledb32.dll", OpenDSLFile C:\test.udl
NOTE: If we simply double click on the UDL file instead of running the above command on command line, it will list out 64 bit OLE DB providers by default.
» How to run 32-bit UDL file on a 64-bit Operating System | Chaitanya's Blogs -- SQL Developer findings