activeQT problem with Qt5 and not with Qt4

[gegebelzebuth]

Hello everybody,

I'm having a problem porting an application from Qt 4.8 to Qt 5.3

That code is working with Qt 4.8 :

QAxWidget * ax = new QAxWidget();
bool ret1 = ax->setControl("{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}");
QVariantList params;
params << 1 << "192.168.0.50";
int ret2 = ax->dynamicCall("SetURL(int, QString)", params).toInt();

QAxWidget * ax = new QAxWidget();
bool ret1 = ax->setControl("{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}");
QVariantList params;
params << 1 << "192.168.0.50";
int ret2 = ax->dynamicCall("SetURL(int, QString)", params).toInt();

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I can compile it with Qt5 without problem but ret2 is giving me an error code

if I change my code to :

...
params << 1 << "";
int ret2 = ax->dynamicCall("SetURL(int, QString)", params).toInt();

...
params << 1 << "";
int ret2 = ax->dynamicCall("SetURL(int, QString)", params).toInt();

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ret2 is good (but of course i need to put an IP Address)

Any idea ?
Thx !

[ChrisW67]

Perhaps it would be good to share the run time error code and its meaning.

[gegebelzebuth]

Thank you but i haven't got any runtime error
All seems ok, but the return code (ret2) is different with QT5.
the return code is good if i put QString("") as parameter for both QT5 and QT4
the return is not good if i put QString("192.168.0.50") on QT5
the return is good if i put QString("192.168.0.50") on QT4

[d_stranz]

In all my years of programming, I have never seen the error codes "good" and "not good" in connection with ActiveX. I've seen S_OK, 0x80040154 and many others, but never those two. You must be using the Express version of ActiveX.