void debugVAOState(std::string baseMessage)
{
    baseMessage.append( " ... querying VAO state:n" );
    int vab, eabb, eabbs, mva, isOn( 1 ), vaabb;
    glGetIntegerv( GL_VERTEX_ARRAY_BINDING, &vab );
    glGetIntegerv( GL_ELEMENT_ARRAY_BUFFER_BINDING, &eabb );
    glGetBufferParameteriv( GL_ELEMENT_ARRAY_BUFFER, GL_BUFFER_SIZE, &eabbs );

    baseMessage.append( "  VAO: " + std::to_string( vab ) + "n" );
    baseMessage.append( "  IBO: " + std::to_string( eabb ) + ", size=" + std::to_string( eabbs )  + "n" );

    glGetIntegerv( GL_MAX_VERTEX_ATTRIBS, &mva );
    for ( unsigned i = 0; i < mva; ++i )
    {
        glGetVertexAttribiv( i, GL_VERTEX_ATTRIB_ARRAY_ENABLED, &isOn );
        if ( isOn )
        {
            glGetVertexAttribiv( i, GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING, &vaabb );
            baseMessage.append( "  attrib #" + std::to_string( i ) + ": VBO=" + std::to_string( vaabb ) + "n" );
        }
    }
    OutputDebugString( baseMessage.c_str() );
}