Returns the specified number of bytes, from the specified location, into a RAW or MEMPTR variable.
If the variable that accepts the returned data is a RAW variable and numbytes is greater than its length but less than or equal to 32K, the AVM increases the size of the variable to numbytes.
If either the source location, source, or the variable that accepts the returned data is a RAW value, and numbytes is greater than 32K, the AVM generates a run-time error.
If the variable that accepts the returned data is a MEMPTR variable and numbytes is greater than its length, the AVM generates a run-time error.