Call function of DLL at testcomplete

Hi Buddy ,

i failed to call function of DLL which is developed in C++

the function of DLL in C++ as below

#include "stdafx.h"
int add(int a, int b)
{
return a + b;

}

my script at testcomplete is as below

sub test
dim a
set Def_Dll=DLL.DefineDLL("test_dll")

Call Def_DLL.DefineProc("addA",vt_i4,vt_i4,vt_i4)
Call Def_DLL.DefineAlias("add", "addA")

set Lib=Dll.Load("C:\Users\H208139\Desktop\test_dll\Debug\test_dll.dll","test_dll")

a=Lib.add(1,2)
log.Message(a)

end sub

test result :Object doesn't support this property or method: 'Lib.add'

12 Replies

nikki85
Contributor
6 years ago
add attchment
test_dll.7z18.6 MB
- tristaanogre
  Esteemed Contributor
  6 years ago
  I'm not 100% certain.... but you are defining the procedure/method and giving it an Alias of addA. The DefineProc should be using the method name as it is called in the DLL.... So, with that, shouldn't your code be...
  
  sub test dim a set Def_Dll=DLL.DefineDLL("test_dll") Call Def_DLL.DefineProc("add",vt_i4,vt_i4,vt_i4) Call Def_DLL.DefineAlias("addA", "add") set Lib=Dll.Load("C:\Users\H208139\Desktop\test_dll\Debug\test_dll.dll","test_dll") a=Lib.addA(1,2) log.Message(a) end sub
AlexKaras
Champion Level 3
6 years ago
Hi,

Check that your DLL meets requirements from https://support.smartbear.com/testcomplete/docs/testing-with/advanced/using-external-functions/calling-from-dll/known-limitations.html.

Especially those:

-- Only standalone exported routines can be called from TestComplete tests. There is no way to call methods of exported classes.

-- The DLL routine to be called must match the stdcall calling convention.

Also check the bitness of TestComplete and DLL (https://support.smartbear.com/testcomplete/docs/testing-with/advanced/using-external-functions/calling-from-dll/specifics-of-32-and-64-bit-dlls.html).
- TanyaYatskovska
  SmartBear Alumni (Retired)
  6 years ago
  nikki85, did you find an answer to your question? Please, share your solution with us.
  - nikki85
    Contributor
    6 years ago
    hi TanyaGorbunova
    
    still no solution