// worksheet with the data
	Worksheet wks("surface");
	
        // create matrixpage to accomodate the data
	MatrixPage mp("matrix1"); 	
	mp.Create("origin"); 
	MatrixLayer mly = mp.Layers(0); 
	Matrix matA(mly);
	
        // copy data to matrix
	matA.CopyFromWks(wks);
        
        // define X axis values and Y axis values for surface
        matA.Xmin = -10;
        matA.Xmax = 10;
        matA.Ymin = 0;
        matA.Ymax =100;
	
        MatrixObject mobj = mly.MatrixObjects();

	// create graph
	GraphPage gp;
	gp.Create("Wirefrm");// important!!
	
        GraphLayer glay = gp.Layers();
	// plot surface and indicate that it should be a 
        // IDM_PLOT_SURFACE_COLORMAP for colormap
	// or IDM_PLOT_SURFACE_WIREFRAME for WIREFRAME
	// 
	int nPlot = glay.AddPlot(mobj, IDM_PLOT_SURFACE_COLORMAP);
	glay.Rescale();