Our installer includes a .NET assembly component MyCustomActions.dll, which
is marked with ¡°.NET COM interop¡± in InstallShield. At installation,
InstallShield runs "regasm MyCustomActions.dll /regfile MyCustomActions.reg
/Codebase" to create registry entries on the target system to allow COM
objects to call the .NET assembly. MyCustomActions.dll assembly contains a
class that is derived from System.ComponentModel.Component and is marked
with [ComVisible(true)]. A few custom actions written in InstallScript
calls CreateObject to create an object instance and invokes the functions.
For example:
set ojb = CreateObject("MyCustomActions.TestClass1");
result = obj.TestMethod1();
Now that I am converting it to WIX, I need to write the equivalent code in
C++ for CreateObject. From what I understand, I need to import the type
library for MyCustomActions.dll and create an interface pointer with
CoCreateInstance. However, MyCustomActions.dll assembly does not explicitly
declare any interface, and currently no type library is created in the build
or install process. How does CreateObject create the instance and invoke
the method? I am hoping that I do not have to modify the source code and
build script for MyCustomActions.dll.
Thanks,
-WenWu
P.S. Instead of importing the type library, another idea I tried but failed
is to import the ProgID, e.g. #import "MyCustomActions.TestClass1". Maybe I
am not using the correct import attributes?
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