IDirect3DViewport2::SetViewport2
The IDirect3DViewport2::SetViewport2 method sets the viewport registers of the viewport.
HRESULT SetViewport2(
LPD3DVIEWPORT2 lpData
);
Parameters
lpData
Address of a D3DVIEWPORT2 structure that contains the new viewport.
Return Values
If the method succeeds, the return value is D3D_OK.
If the method fails, the return value may be one of the following values:
DDERR_INVALIDOBJECT 
DDERR_INVALIDPARAMS 
QuickInfo
  Windows NT: Use version 5.0 or later.
  Windows: Use Windows 95 or later. Available as a redistributable for Windows 95.
  Windows CE: Unsupported.
  Header: Declared in d3d.h.
  Import Library: Use ddraw.lib.
See Also