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# lockrect() in d3d8

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i''ve done this already and it seems to work:
  D3DLOCKED_RECT scr[640*480]; // is this right? screen->LockRect( scr, NULL, NULL ); // returns D3D_OK // here i would like to read and modify scr[]. screen->UnlockRect(); 
so how can i read "void* pBits" from scr? i don''t understand these void-thingies... i''ve tried to do something myself, but everytime i get only zeros or some random numbers.