Why is the SetupDiCallClassInstaller function limited to 64-bit programs?

Question

Attempting to call SetupDiCallClassInstaller from a program compiled in 32-bit mode does not work on 64-bit Windows.

This seems to be by design, but I would like to know the reason.

Answer 1

According to MSDN:

Device settings on 64-bit systems :

32- , UpdateDriverForPlugAndPlayDevices. ERROR_IN_WOW64, 32- 64- . CreateProcess ( Windows SDK), 64- . 64- UpdateDriverForPlugAndPlayDevices, FullInfPath, 64- .

, , API, ERROR_IN_WOW64, WOW64, 32- 64- API.

Answer 2

32- 64- , , 64- . , 64- 64- , 32- 32- .