GetProcAddress Fail in VC++ App while using VB Dll

[JMurugesh]

I have created a VB DLL using the code given below. And then I tried to use that DLL in an VC++ Win32 application. Where the LoadLibrary/AfxLoadLibrary were working ok. But the GetProcAddress calls always returning NULL. Can anybody help?


VB Dll code:

Public Function LoadResourceInt eger(ByVal theStringID As Integer) As Integer
LoadResourceInt eger = 0
On Error GoTo ErrMsg
LoadResourceInt eger = 1000
Exit Function
ErrMsg:
LoadResourceInt eger = 0
MsgBox ("Resource:miss ing in MUI Resource File.") ' MUI - Multilanguage User Interface
End Function



VC++ Win32 App uses that VB DLL:


typedef int (__stdcall *LoadRessString )(int argument1);

HINSTANCE hMod;
hMod = AfxLoadLibrary( "MUIResourceEng lish.dll");
if(NULL == hMod)
{
MessageBox("Obj ect Not Created","Capti on",MB_OK);
return;
}
else
{
LoadRessString localLoadResStr ing;
localLoadResStr ing = (LoadRessString ) GetProcAddress( hMod,"LoadResou rceInteger");
if(localLoadRes String == NULL)
{
MessageBox("Get ProcAdress Failed","Captio n",MB_OK);
FreeLibrary( hMod);
return;
}
int myResString = localLoadResStr ing(1);
MessageBox("Suc cess","Caption" ,MB_OK);
return ;
}GetProcAddress (hMod,"LoadReso urceInteger");
if(localLoadRes String == NULL)
{
MessageBox("Get ProcAdress Failed","Captio n",MB_OK);
FreeLibrary( hMod);
return;
}

int myResString = localLoadResStr ing(1);
MessageBox("Suc cess","Caption" ,MB_OK);
return ;
}

Jothi Murugeswaran.S

[AHMEDYO]

HI...

ops man, visual basic 6.0 just can export COM classes it cant export function as API, just you can call class members that exported by VB6 from VC++ by using import directive or COM API functions

[CODE=cpp]
#import "yourCOMdll.dll l"
[/CODE]

or you can use COM API functions as CoCreateInstanc e, CoGetobject as so on....

finally GetprocAddress is working only with Dll have API as Windows API kernel.dll and user32.dll and this type of dll VB6 cannot export but if you reverse your operaion it will work, you can create dll from VC++ that you can use from VB6 by GetProcAddress and LoadLibrary

GOOD LUCK...

[JMurugesh]

HI...

ops man, visual basic 6.0 just can export COM classes it cant export function as API, just you can call class members that exported by VB6 from VC++ by using import directive or COM API functions

[CODE=cpp]
#import "yourCOMdll.dll l"
[/CODE]

or you can use COM API functions as CoCreateInstanc e, CoGetobject as so on....

finally GetprocAddress is working only with Dll have API as Windows API kernel.dll and user32.dll and this type of dll VB6 cannot export but if you reverse your operaion it will work, you can create dll from VC++ that you can use from VB6 by GetProcAddress and LoadLibrary

GOOD LUCK...

Thanks for reply
How to use the cocreateinstanc e?

[AHMEDYO]

HI...

COM API Functions as CoCreateInstanc e it not just a function call , it need more knowledge about COM Objects, this link may be help you

http://msdn2.microsoft.com/en-us/library/ms686615.aspx

Kind Regards

[JMurugesh]

HI...

COM API Functions as CoCreateInstanc e it not just a function call , it need more knowledge about COM Objects, this link may be help you

http://msdn2.microsoft.com/en-us/library/ms686615.aspx

Kind Regards

I need an example for that....
and also i want to make sure that , by using this method can we access the functions(witho ut hardcoding import, idl,..) present in the activex dll created in vb?

[AHMEDYO]

HI..

ok i will get you an example in my second post, but there is no third way to do that within VC++, only Import Directive and COM API Functions can be used to create COM Objects.

Bext Regards