On line 202 you retrieve file size but fail to check for INVALID_FILE_SIZE (-1) return value.
Should GetFileSize fail on a 32 bit system, allocation on line 204 will throw an std::bad_array_new_length exception.
Additionally you don't check either the result of the byte array allocation which could fail on very big files or in case of high memory pressure.
On line 202 you retrieve file size but fail to check for INVALID_FILE_SIZE (-1) return value. Should GetFileSize fail on a 32 bit system, allocation on line 204 will throw an std::bad_array_new_length exception.
Additionally you don't check either the result of the byte array allocation which could fail on very big files or in case of high memory pressure.