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krkarthik_info's avatar
krkarthik_info
Frequent Contributor
6 years ago

Unable to load C++ DLL

Hi All,   I have been trying to access routines from C++ DLL through TestComplete. But am getting the error as "Unable to load the dll library".   Using the below code to load the dll in Test...
  • krkarthik_info's avatar
    krkarthik_info
    6 years ago

    Hi Alex,

     

    Thanks for the suggestions. Actually I have gone through those limitations. 

     

    My DLL were referring two more DLL's. So I tried to call those DLL's first using DLL.Load() before calling my actual DLL. 

    This way I was able to resolved the issue on loading the DLL.

     

    After this, my next question arise out of the situation is:

    Can we call the C++ routines which resides inside the class as

    ClassName.RoutineName(arguments)

    Thanks in advance.

     

    Thanks,

    Karthik K R

     

krkarthik_info's avatar
krkarthik_info
Frequent Contributor

Hi Alex,

 

Thanks for the suggestions. Actually I have gone through those limitations. 

 

My DLL were referring two more DLL's. So I tried to call those DLL's first using DLL.Load() before calling my actual DLL. 

This way I was able to resolved the issue on loading the DLL.

 

After this, my next question arise out of the situation is:

Can we call the C++ routines which resides inside the class as

ClassName.RoutineName(arguments)

Thanks in advance.

 

Thanks,

Karthik K R

 

AlexKaras's avatar
AlexKaras
Champion Level 3
6 years ago

Hi,

 

> ClassName.RoutineName(arguments)

I am pretty sure this is not possible because:

a)  In order to do this, the class instance must be created first; and

b) There is no way for TestComplete to get info as for how to call this or that method of some class. COM objects provide such information, but not regular classes.

 

  • krkarthik_info's avatar
    krkarthik_info
    Frequent Contributor
    6 years ago

    Hi Alex,

     

    Thanks for your reply.

     

    I believe we can get the instance of the class through calling constructor like how dotNET object allows us to call the class constructors (zctor, zctor1..). But I am not sure how to achieve this through DLL object.

     

    Thanks,

    Karthik K R

    • AlexKaras's avatar
      AlexKaras
      Champion Level 3
      6 years ago

      Hi,

       

      dotNET and C++ runtime have quite different architecture and I am far nor sure that even if you manage to call class constructor, created object can be stored in script runtime memory and be accessible.

      You may contact Support via the https://support.smartbear.com/message/?prod=TestComplete form to ask their opinion.

       

      As a possible option, you may consider to create a helper DLL (or COM object) that will create an instance of this class and call its methods via regular DLL exported functions.

       

      P.S. Out of curiosity - what is your goal? Is it possible to achieve it through, say, functionality provided by .Net via CLR  Bridge in TestComplete?