[Solved] Calling VS DLLs :(
Can somebody give me a clue - I'm trying to call a VS2010 DLL from Qt5.2.1 (for VS2010).
I've successfully called the DLL from VS and I've successfully called a Qt DLL from a Qt host app. But when I try to call the VS DLL from Qt the same way I call the Qt DLL, I get the "LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall MyCDllClass::MyCDllClass(void)" plus the same messages for the destructor and the Test() method.
To use the DLL in Qt, I simply use Add Library -> External, then select the .lib file and then with Add Existing Files, I add the header of the DLL, which looks like
#define DLLCLASS __declspec(dllexport)
#define DLLCLASS __declspec(dllimport)
class DLLCLASS MyCDllClass
Don't use Add Existing Files to include external library headers. Use INCLUDEPATH in your .pro file instead.
Ok, thanks, I'll definitely try that and see how it works!
In the end the problem was mismatched files and that I had to uncheck the "Add -d suffix for debug version". Stupid of me. Sorry for the bother, but while things didn't work, everything started to mess up and I spent half a day tearing my hair, so finally decided to call for help.
And, as expected, a while later I find it's my own stupid mistake.
Thanks and cheers ;)
[quote author="MwRain" date="1396431194"]Sorry for the bother, but while things didn't work, everything started to mess up and I spent half a day tearing my hair, so finally decided to call for help.
And, as expected, a while later I find it's my own stupid mistake.[/quote]
No problem, I guess those kind of situations happen to every programmer occasionally ;)