[DirectX 7 Programmer's Reference] Transparency in Blits to Compressed Textures (100%)

Microsoft DirectX 7.0 > DirectDraw > DirectDraw Essentials > Surfaces > Compressed Texture Surfaces

[DirectX 3 Programmer's Reference] Transparency and Translucency (28.1847537976123%)

Direct3D > Immediate-Mode Overview > Introduction to Direct3D Immediate-Mode Objects > IDirect3DTexture Interface

[DirectX 5 Programmer's Reference] Transparency and Translucency (28.1845522574423%)

DirectX Foundation > Direct3D Immediate Mode > Direct3D Immediate-Mode Essentials > Textures