void pset_redbmp(System::Drawing::Graphics^ g){
    Bitmap^ bmp = gcnew Bitmap(640,480);
    for(int x=0; x< 640; x++){
        for (int y= 0; y< 480; y++){
            bmp->SetPixel(x,y,Color::Red); // Color::FromArgb(0,0,255)
        }
    }
    g->DrawImage(bmp,Point(0,30));
    delete bmp;
}

PSET using drawline.

void pset(Graphics^ g, int x, int y, int color){
    g->DrawLine(get8ColPen(color), x, y, x, y+1);

}