<!-- ##### SECTION Title ##### -->
vsnprintf

<!-- ##### SECTION Short_Description ##### -->


<!-- ##### SECTION Long_Description ##### -->
<para>

</para>

<!-- ##### SECTION See_Also ##### -->
<para>

</para>

<!-- ##### FUNCTION vsnprintf ##### -->
<para>

</para>

@s: 
@buf_size: 
@format: 
@ap: 
@Returns: 


