access 64bit dll from 32bit process using C++

Question

I do release that its not possible to load 64bit dll into 32bit dll in the same process. However i can put my 64bit dll into com and access that com from my 32bit app. Can anyone provide me a sample for doing so? Are there any other means to solve this issue?

Note: I cannot build the 64bit dll to 32 bit as its external 3rd party dll and i cannot convert my 32bit process to 64 bit as its a very huge application.Converting that to 64bit would require me many years.

Any help would be appreciated

Answer 1

you can leverage process communication about access 64bit from 32bit Process.
Below are some steps.

1. Make a COM server, example , you can modify project property to generate 64bit program.

2. Define and implement com interface , in COM server, you load 64bit dll, and wrapper dll function.

3. 32bit App call COM server interface( CLSCTX_ACTIVATE_64_BIT_SERVER ), send data by parameter and get result.