I dont knw if anyone can help me but:

Here is my macro:

```
#define __CALC_CURRENT__ (a,b) ((a) * (b))
```

It basically multiplies a by b.

When calling the macro i use this:

```
curX = __CALC_CURRENT__(tree->branches[n].dirX, tree->branches[n].length);
```

For some reason and i dont know why i get the following errors:

```
error C2065: 'a' : undeclared identifier
error C2065: 'b' : undeclared identifier
error C2064: term does not evaluate to a function
error C2064: term does not evaluate to a function
error C2064: term does not evaluate to a function
```

And it all relates to calling the macro.

I have erad the indispensible guide to C part on macros and cant see the problem.

Can someone please help. Thanks.