DX step by step (1) -- d3d initialization steps

Before performing the following steps, you must:

# Include <d3dx9. h>

 

# Pragma comment (Lib, "d3d9. lib ")
# Pragma comment (Lib, "d3dx9. lib ")

 

1. Obtain the idirect3d9 pointer through the direct3dcreate9 interface (d3d_sdk_version;

2. Use the getdevicecaps interface of the idriect3d9 pointer to determine whether the video card supports hardware vertex operations. If the hardware does not support this operation, use the software to simulate vertex operations;

3. Use 2nd test results to initialize the d3dpresent_parameters structure;

4. Use the 3rd d3dpresent_parameters structure to create the device interface idirect3ddevice9;

5. Why did I get the idirect3ddevice9 interface.