QVariant activeqt question

[drdre]

I'm using activeQt to call a COM dll and the function I need to use has a VARIANT* datatype as a function parameter.

From visual studio I can do the following:

(import COMClass as MFC class from type lib)
VARIANT x;
VariantInit(&x);
COMClass.functionToCall(&x); //this will work

but if I do this without VariantInit(&x); it won't work

Now if I do the same thing in Qt:

(use dumpcpp to generate type lib from dll and create a COMCLass object)
QVariant x;
COMClass.functionToCall(&x); //won't work

it doesn't work. Is there any reason for this? Could it be because QVariant doesn't have a corresponding VT_EMPTY data type to initialize to?

[giesbert]

QVariant != VARIANT!!!

the thing you have to do it this way in MFC is that VARIANT is a structure so it has no constructor. In MFC you could use CVariant which does this implicitly.

I'm not 100% sure what to do in ActiveQ there