grrr... I've found the answer to my own question. Please ignore my query
below. For some reason my searching through the doco before I sent the email
didn't find what I wanted, but after sending the email, I found it:
typedef enum ogr_style_tool_param_pen_id
{
OGRSTPenColor = 0,
Hi guys,
I found that there seems to be no explicit C API for the non-generic style tool
classes such as 'OGRStylePen'. Now I've just found the documentation at
https://trac.osgeo.org/gdal/wiki/rfc18_ogr_styles_c_api which states that this
is deliberate and that they are unecessary, stating:
