GM_SetFeatureLabel

GM_Error_t32 __stdcall GM_SetFeatureLabel
(
GM_LayerHandle_t32      aLayer,             // IN: Layer the feature is in
GM_FeatureClassType_t8  aFeatureClassType,  // IN: Type of feature class (area, point, line)
uint32                  aFeatureIndex,      // IN: Index of feature in layer
const char*             aLabel              // IN: New display label for feature.
)