writing to mem using pointer

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Hi

I am trying to write to memory using a pointer, but i have no idea how to do it.

The function is defined:
Function ReadToBuff(file:TStream,offset,ptr_dest_buff:Byte Ptr)

SeekStream(file,offset)
...loop
val = Readint(file)
and now im trying to write the int into the buffer, but how?
something like that...:
'ptr_dest_buff[cnt] = val

...end loop

As you wuold have guessed, ptr_dest_buff is a pointer to buffer in which i want to write.

What i want to do is to read a portion of a binary file into a matrix, if you've got any other ideas let me know.

Thanks