How do I use InstallCtrlCallback with a class member function in Visual C 6.0?

[LAG 77]

I'm using Visual C++ 6.0.
I have a class definition with the following private member function declaration.

private:
int CVICALLBACK commandRoll(int panel,
int control,
int event,
void *callbackData,
int eventData1,
int eventData2);

Within another member function of the same class, I'm trying to call:

status = InstallCtrlCallback (itcsHandle,
ITCSGui_rollProp,
commandRoll, &callbackData);

I get following compiler error:

error C2664: 'InstallCtrlCallback' : cannot convert parameter 3 from 'int (int,int,in
t,void *,int,int)' to 'int (__cdecl *)(int,int,int,void *,int,int)'
None of the functions with this name in scope match the target type.

[Jattie]

You will most probably get this question answered at the Develope Studio Forum.

[bilalD]

Hello

I believe the callback member function needs to be static. Check out this article for more information.

Hope this helps

Bilal Durrani
NI