Calling PB DLL from 'C'

[Sandy Chevrette]

Assume I have a PB DLL with the following exported method that
has one array argument:

MyMethod(BYVAL PBArrayIn as DWORD) EXPORT

Then, in my PB code I map the memory to this array as follows:

DIM PBArray(5, 3, 2) as double AT PBArrayIn

If I want to call this method from 'C', how should I dimension
the array that I am passing in? I was told to do the following:

double PassedArray[2][3][5]; (dimensioned opposite as PBArray above)

Is this right? Why?

Thanks for you help on this!

[Florent Heyworth]

That's correct - PB stores array in column-major order
with (0,0) first, (1,0) second, etc.. whereas C stores
arrays in row major order: (0,0),(0,1), etc...

Cheers

Florent

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[Peter Manders]

> double PassedArray[2][3][5]; (dimensioned opposite as PBArray above)

Be careful with that, it should be:

double PassedArray[3][4][6]; (dimensioned opposite as PBArray above)

Basic subscipts are default 0 to #Elements, in C you have to specify the number of elements, which is one more.


Peter.


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