* \fn GHANDLE GUIAPI JoinLayer (const char* layer_name, const char* client_name, int max_nr_highers, int max_nr_normals) * \brief Joins to a layer. * * This function should be called by clients before calling any other MiniGUI * functions. You can call \a GetLayerInfo to get the layer information. * If the layer to be joined does not exist, the server, i.e. \a
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