GM_DrawGridLines |
Draws grid lines (either lat/lon or in the view projection) for the specified location to the provided device context at the given location. If aWorldBounds is not NULL, at least the specified area will be drawn. The aspect ratio of the screen pixels will be maintained, so slightly more of the world bounds than specified may be drawn. If aWorldBounds is NULL, the grid bounds rendered will be that of all loaded layers.
SyntaxGM_Error_t32 GM_DrawGridLines ( HDC aDC, // Device context to draw to boolean aLatLonGrid, // Draw a lat/lon grid or a view projection grid double aGridSpacing, // Grid spacing (use 0.0 for default) const GM_Rectangle_t* aWorldBounds, // World bounds to draw or NULL for all sint32 aLeftPixel, // Left pixel coordinate to draw to sint32 aTopPixel, // Top pixel coordinate to draw to sint32 aPixelWidth, // Width in pixels to draw sint32 aPixelHeight // Height in pixels to draw );