How can I declare and use a GLOBAL DYNAMIC ARRAY ????

I am using BC++ v3.1 and the following is what I did; but seems like the
contents of it lost somewhere ......

MAIN_1.CPP

myDataType *array1, *array2;

....
....

array1 = new myDataType huge[1000];
array2 = new myDataType huge[1000];

...etc

SUB_1.CPP

extern myDataType *array1, *array2;

function xxx(....)

array1.a[1] = ....
array1.a[2] = ....


Anyone can tell me what is wrong with this or lead me to the right directions?

Thanks,
Tony