Thread: rate my directx code

since i saw a lot of posts say that directx has to do with games, so ima post this here. all this does is inits directx. let me know what u think. i dont wanna get started with more directx stuff if the basics isnt good.

Code:

#include <windows.h>
#include <d3d9.h>
//d3d9.lib d3dx9.lib winmm.lib       mental note: always link
HWND MainWindowHandle = 0;

D3DCAPS9 caps;
IDirect3D9 *d3d9 = 0;

int Run()
{
	MSG msg;
	::ZeroMemory(&msg,sizeof(MSG));

	while(::GetMessage(&msg,0,0,0))
	{
		::TranslateMessage(&msg);
		::DispatchMessage(&msg);
	}
	return (INT)msg.wParam;
}

LRESULT CALLBACK WndProc(HWND windowHandle, UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch(msg)
	{
	case WM_KEYDOWN:
		{
		if(wParam == VK_ESCAPE)
			::DestroyWindow(MainWindowHandle);
	  /*if(wParam == VK_RETURN)
			MessageBox(0,"Hello Steph","You Swamper",MB_OK);
		if(wParam == 'M')
			MessageBox(0,"Button M pressed","Button hit",MB_OK);
		if(wParam == 'N')
			MessageBox(0,"Button n pressed","Button hit",MB_OK);
		else
			MessageBox(0,"Unknown Command","Button hit",MB_OK);*/
		break;
		}
	case WM_DESTROY:
		{
			::PostQuitMessage(0);
			break;
		}
	}
	return ::DefWindowProc(windowHandle,msg,wParam,lParam);
}

bool InitWindowsApp(HINSTANCE instanceHandle, int nCmdShow)
{
	WNDCLASS wc;												//windows class
	wc.style		= CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc  = WndProc;
	wc.cbClsExtra   = 0;
	wc.cbWndExtra	= 0;
	wc.hInstance	= instanceHandle;
	wc.hCursor		= ::LoadCursor(0, IDC_ARROW);
	wc.hIcon		= ::LoadIcon(0, IDI_APPLICATION);
	wc.hbrBackground= 
		static_cast<HBRUSH>(::GetStockObject(WHITE_BRUSH));
	wc.lpszMenuName = 0;
	wc.lpszClassName= "Test";

	if(!::RegisterClass(&wc))
	{
		::MessageBox(0,"Regester class failed", "FAILED1", MB_OK);
		return false;
	}

	MainWindowHandle = ::CreateWindow("Test",
									"Hello World", 
									WS_OVERLAPPEDWINDOW,
									CW_USEDEFAULT,
									CW_USEDEFAULT,
									CW_USEDEFAULT,
									CW_USEDEFAULT,
									0,
									0,
									instanceHandle,
									0);
	if(MainWindowHandle == 0)
	{
		MessageBox(0,"Create Window failed", "FAILED", MB_OK);
		return false;
	}
	::ShowWindow(MainWindowHandle,nCmdShow);
	::UpdateWindow(MainWindowHandle);
	return true;
}

bool initDirect3d()
{
	d3d9 = Direct3DCreate9(D3D_SDK_VERSION);    //pointer to direct3d interface
	if(d3d9 == 0)
	{
		MessageBox(0,"error - direct3dcreate","error",MB_OK);
		return false;
	}
	d3d9->GetDeviceCaps(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,&caps);
	
	//hardware/software vertex processing check
	int vp;
	if(caps.DevCaps && D3DDEVCAPS_HWTRANSFORMANDLIGHT)
		vp = D3DCREATE_HARDWARE_VERTEXPROCESSING;
	else
		vp = D3DCREATE_SOFTWARE_VERTEXPROCESSING;


	D3DPRESENT_PARAMETERS d3dpp;
	d3dpp.BackBufferWidth	= 800;
	d3dpp.BackBufferHeight	= 600;
	d3dpp.BackBufferFormat	= D3DFMT_A8R8G8B8;
	d3dpp.BackBufferCount	= 1;
	d3dpp.MultiSampleType	= D3DMULTISAMPLE_NONE;
	d3dpp.MultiSampleQuality= 0;
	d3dpp.SwapEffect		= D3DSWAPEFFECT_DISCARD;
	d3dpp.hDeviceWindow		= MainWindowHandle;
	d3dpp.Windowed			= false;
	d3dpp.EnableAutoDepthStencil = true;
	d3dpp.AutoDepthStencilFormat = D3DFMT_D24S8;
	d3dpp.Flags				= 0;
	d3dpp.FullScreen_RefreshRateInHz = D3DPRESENT_RATE_DEFAULT;
	d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;

	IDirect3DDevice9 *device = 0;
	HRESULT hr = d3d9->CreateDevice(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,MainWindowHandle,vp,
						&d3dpp,&device);
	if(FAILED(hr))
	{
		MessageBox(0,"createdevice failed","error",MB_OK);
		return false;
	}

	return true;

}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
				   LPSTR lpCmdLine, int nCmdShow)
{
	//init the window
	InitWindowsApp(hInstance, nCmdShow);
	
	if(!initDirect3d())
	{
		MessageBox(0,"Direct3d init error","Error!",MB_OK);
		return 0;
	}
	Run();
	d3d9->Release();
	return 0;
}