DLL.CallFunction can not work

I used DLL.CallFunction to call a dll which coded by delphi.
But the SUF.exe always cash.

Does setup factory do not support dll wirtten by delphi?

code like this, this "init" function do not need to pass any parameters:
DLL.CallFunction(SessionVar.Expand("%TempLaunchFol der%\\test.dll"), "Init", "", DLL_RETURN_TYPE_INTEGER, DLL_CALL_STDCALL);