win64 - rundll32.exe equivalent for 64-bit DLLs

Question

Is there an equivalent of rundll32.exe for calling 64-bit DLLs?

Answer 1

On 64-bit versions of Windows, two rundll32.exe programs exist:

• 64-bit: C:WindowsSystem32 undll32.exe
• 32-bit: C:WindowsSysWOW64 undll32.exe

If you are trying to do this from a 32-bit program, you might need to use C:WindowsSysnative or temporarily turn off WoW64 file system redirection. See the Microsoft documentation.