@BPOKE[handle,offset,size,value[,+]] : Write a value to a binary buffer.
handle - a binary handle from @BALLOC
offset - the byte offset in the buffer (decimal or hex)
size - the size of the value (in bytes):
1 - character
2 - short
4 - int
8 - int64
value - the value to poke
+ - an optional fourth parameter +, which indicates that the value is a signed number.
@BPOKE returns 0 on success.
Example:
set handle=%@balloc[128]
set value=%@bpoke[%handle,0,4,1234]
