void hw_EncodeBase64(UBYTE *src, int srclen, UBYTE *dst, int *dstlen,
struct hwTagList *tags);
src up until srclen bytes have been
read. The encoded bytes will be written to the dst buffer. Make sure that this
buffer is large enough to hold the encoded Base64 data. After encoding, hw_EncodeBase64()
will also write the output length to dstlen. Note that you must set dstlen to
0 before calling this function because hw_EncodeBase64() won't do that.
int which will receive the length of the encoded data;
must be set to 0 by you!NULL for now