XPLMDrawMapLabel

XPLMDrawMapLabel

XPLM_API void       XPLMDrawMapLabel(
                         XPLMMapLayerID       layer,    
                         const char *         inText,    
                         float                mapX,    
                         float                mapY,    
                         XPLMMapOrientation   orientation,    
                         float                rotationDegrees);    

Enables plugin-created map layers to draw text labels using X-Plane’s built-in labeling functionality. Only valid from within an XPLMMapLabelDrawingCallback_f (but you can request an arbitrary number of text labels to be drawn from within your callback).