GameMaker - Vertex Buffer From .dat file

function LoadModelBuffer(_fileName, _format) {

    if(!file_exists(_fileName))
    {
        show_debug_message("File not Found: " + string(_fileName));
        return noone;
    }

    var _buff = buffer_load(_fileName);
    var _vBuff = vertex_create_buffer_from_buffer(_buff, _format);
    buffer_delete(_buff);
    return _vBuff;
}

function VertexFormatDefault()
{
    vertex_format_begin();
    vertex_format_add_position_3d();
    vertex_format_add_normal();
    vertex_format_add_color();
    vertex_format_add_texcoord();
    return vertex_format_end();
}

// When initializing game
global.VFormat = VertexFormatDefault();

// In the actor object
Mesh = LoadModelBuffer(file.dat, global.VFormat);
Texture = sprite_get_texture(TextureSprite, 0);

// Actors drawing
vertex_submit(Mesh, pr_trianglelist, Texture);   // After setting draw matrix etc.