Copies the specified error parameter into the provided buffer.
public size_t GetParameter(ul_u_short parmNo, char * dst, size_t len)
parmNo A 1-based parameter number.
dst The buffer to receive the parameter.
len The size of the buffer.
The size required to store the parameter, or zero if the ordinal is not valid. The parameter is truncated if the return value is larger than len.
The output string is always null-terminated, even if the buffer is too small and the string is truncated.