void ClearTarget(int target,DWORD color,float z,DWORD stencil)
    Clear the backbuffer with parameters.
    
    Target:  You can add them. Flags.:
          D3DCLEAR_TARGET
          D3DCLEAR_ZBUFFER
          D3DCLEAR_STENCIL

    Color: color of the background

    Z: 1 is the farthest

    Stencil: Value of stencil. Normally it is zero.


    Result:
    none