   Problem with changing view
  hi allin my program using D3D anc c++, i have the methods to change between windowed and fullscreen by pressing the F key, ive resently added sone transformed vertices to my other untransformed ones, stored the same, but only now relized that when i press f to change to windowed it errors up on me and says invalid paramiters, changes fine with the untransformed ones, any idea why it might be doing that?   