[DirectX 8.1 C/C++ Programmer's Reference] Viewport Rectangle (58.8235294117647%)

DirectX 8.1 (C++) > DirectX Graphics > Programmers Guide > Using Direct3D > Viewports and Clipping

[DirectX 8.1 Visual Basic Programmer's Reference] Viewport Rectangle (58.8235294117647%)

DirectX 8.1 (Visual Basic) > DirectX Graphics > Programmers Guide > Using Direct3D > Viewports and Clipping

[DirectX 8.1 C/C++ Programmer's Reference] Viewport Scaling (49.1013071895425%)

DirectX 8.1 (C++) > DirectX Graphics > Programmers Guide > Using Direct3D > Viewports and Clipping

[DirectX 8.1 Visual Basic Programmer's Reference] Viewport Scaling (49.1013071895425%)

DirectX 8.1 (Visual Basic) > DirectX Graphics > Programmers Guide > Using Direct3D > Viewports and Clipping

[DirectX 6 Programmer's Reference] Viewport Scaling (30.6521093285799%)

DirectX Foundation > Direct3D Immediate Mode > Direct3D Immediate Mode Essentials > The Geometry Pipeline > Viewports and Clipping > Clipping Volumes

[DirectX October 2006 Documentation] Viewport (23.7448009506833%)

DirectX SDK > Introducing DirectX 9.0 > Namespaces > Microsoft.DirectX.Direct3D > Classes > Device > Properties

[DirectX October 2006 Documentation] Viewport (21.1378490790256%)

DirectX SDK > Introducing DirectX 9.0 > Namespaces > Microsoft.DirectX.Direct3D > Structures > Viewport > Methods

[DirectX October 2006 Documentation] Viewport (20.7316376434023%)

DirectX SDK > Introducing DirectX 9.0 > Namespaces > Microsoft.DirectX.Direct3D > Structures