public bool Exists(ObjectType classType, string issuer, string code);
Checks to see if the object referenced by the given ObjectType, issuer, and code exists within the currently loaded datasource.
void CoordTransform_Exists()
{
if(m_DataSource->Exists(GeoBase.ObjectType.GeodeticCoordSysType, BMG_T("BMG"),BMG_T("WGS84_coordinate_system"))
{
//Geodetic WGS84 exists in the DataSource
}
}