First Dx Window

main.cpp

//include the basic windows header files and the Direct3dD Header file
#include <windows.h>
#include <windowsx.h>
#include <d3d9.h>

// Include the DIrect3D library file
#pragma comment (lib, "d3d9.lib")

// global declarations
LPDIRECT3D9 d3d;	// The pointer to our Direct3D Interface
LPDIRECT3DDEVICE9 d3ddev;	// the pointer to the device class

// functiuon prototypes
void initD3D(HWND hWnd);	// Sets up and initializes Direct3D
void render_frame(void);	// Renders a single frame
void cleanD3D(void);		// Closes Direct3D and releases memory

// The window proc function prototype
LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);

// this function initializes and prepares direct3d for use
void initD3D(HWND hWnd)
{
	d3d = Direct3DCreate9(D3D_SDK_VERSION);		// Create the Direct3D Interface
	D3DPRESENT_PARAMETERS d3dpp;	// create a stuct to hold verious device information
	ZeroMemory(&d3dpp, sizeof(d3dpp));		//Clear out the stuct for usee
	d3dpp.Windowed = TRUE;		// Program windowed not full screen
	d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;	// Discard old frames
	d3dpp.hDeviceWindow = hWnd;		// Set the window to be used by Direct3D

	// Create a deviced calss using this information and information from the d3dpp stuct
	d3d->CreateDevice(D3DADAPTER_DEFAULT,
		D3DDEVTYPE_HAL,
		hWnd,
		D3DCREATE_SOFTWARE_VERTEXPROCESSING,
		&d3dpp,
		&d3ddev);
}

// THE FUN STUFF

// this is the function used to render a single frame
void render_frame(void)
{
	// clear the window to a deep blue
	d3ddev->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 40, 100), 1.0f, 0);

	d3ddev->BeginScene();		// this begins the 3D Scene

	// do  3D Rendering on the back buffer here...

	d3ddev->EndScene();			// ends the 3D Scene

	d3ddev->Present(NULL, NULL, NULL, NULL);		// This displays the created frame
}

// THis is the function that cleans up Direct3D and COM
void cleanD3D(void)
{
	d3ddev->Release();		// close and release the 3D Device
	d3d->Release();		//Close and release Direct3D
}