So, I've been learning DirectX10 and have had alot of questions... I'm sure i've frustrated about all the people that are willing to help me with my DirectX problems (Sorry about that) but now i have a new problem. I have some source code that i downloaded from a site a book im learning from sent me to. But for some reason the Compiler says that WndProc isn't identified... Here's the error...

1>------ Build started: Project: Init Direct3D, Configuration: Debug Win32 ------
1>  d3dApp.cpp
1>c:\users\konnor\desktop\partii\common\d3dapp.cpp(58): error C2065: 'WndProc' : undeclared identifier
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

and now the code...

#include "d3dApp.h"
#include <sstream>
#include <windows.h>
#include <D3D10.h>

HWND ghMainWnd = 0;

bool InitWindowsApp (HINSTANCE instanceHandle, int show);

int Run();


LRESULT CALLBACK
MainWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
	static D3DApp* app = 0;

	switch( msg )
	{
		case WM_CREATE:
		{
			// Get the 'this' pointer we passed to CreateWindow via the lpParam parameter.
			CREATESTRUCT* cs = (CREATESTRUCT*)lParam;
			app = (D3DApp*)cs->lpCreateParams;
			return 0;
		}
		case WM_KEYDOWN:
			if(wParam == VK_ESCAPE )
				DestroyWindow(ghMainWnd);
			return 0;

	}

	
	if( app )
		return app->msgProc(msg, wParam, lParam);
	else
		return DefWindowProc(hwnd, msg, wParam, lParam);
}
int WINAPI
WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR pCmdLine, int nShowCmd)
{
	if(!InitWindowsApp(hInstance, nShowCmd))
	return 0;
	return Run();
}

bool InitWindowsApp (HINSTANCE instanceHandle, int show)
{
	WNDCLASS wc;

	wc.style	= CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc = WndProc;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hInstance = instanceHandle;
	wc.hIcon	= LoadIcon(0, IDI_APPLICATION);
	wc.hCursor	= LoadCursor(0, IDC_ARROW);
	wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wc.lpszMenuName = 0;
	wc.lpszClassName = L"BasicWndClass";

	if(!RegisterClass(&wc))
	{
		MessageBox(0, L"RegisterClass FAILED", 0, 0);
		return false;
	}

	ghMainWnd = CreateWindow(
		L"BasicWndCLass",
		L"Win32Basic",
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		0,
		0,
		instanceHandle,
		0);

	if(ghMainWnd == 0)
	{
		MessageBox(0, L"CreateWindow FAILED", 0, 0);
	}

	ShowWindow(ghMainWnd, show);
	UpdateWindow(ghMainWnd);

	return true;
}

int Run()
{
	MSG msg = {0};

	BOOL bRet = 1;
	while( (bRet = GetMessage(&msg, 0, 0, 0)) != 0)
	{
		if(bRet == -1)
		{
			MessageBox(0, L"GetMessage FAILED", L"Error", MB_OK);
			break;
		}
		else
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}
	return (int)msg.wParam;
}

D3DApp::D3DApp(HINSTANCE hInstance)
{
	mhAppInst   = hInstance;
	mhMainWnd   = 0;
	mAppPaused  = false;
	mMinimized  = false;
	mMaximized  = false;
	mResizing   = false;

	mFrameStats = L"";
 
	md3dDevice          = 0;
	mSwapChain          = 0;
	mDepthStencilBuffer = 0;
	mRenderTargetView   = 0;
	mDepthStencilView   = 0;
	mFont               = 0;

	mMainWndCaption = L"D3D10 Application";
	md3dDriverType  = D3D10_DRIVER_TYPE_HARDWARE;
	mClearColor     = D3DXCOLOR(0.0f, 0.0f, 1.0f, 1.0f);
	mClientWidth    = 800;
	mClientHeight   = 600;
}

D3DApp::~D3DApp()
{
	ReleaseCOM(mRenderTargetView);
	ReleaseCOM(mDepthStencilView);
	ReleaseCOM(mSwapChain);
	ReleaseCOM(mDepthStencilBuffer);
	ReleaseCOM(md3dDevice);
	ReleaseCOM(mFont);
}

HINSTANCE D3DApp::getAppInst()
{
	return mhAppInst;
}

HWND D3DApp::getMainWnd()
{
	return mhMainWnd;
}

int D3DApp::run()
{
	MSG msg = {0};
 
	mTimer.reset();

	while(msg.message != WM_QUIT)
	{
		if(PeekMessage( &msg, 0, 0, 0, PM_REMOVE ))
		{
            TranslateMessage( &msg );
            DispatchMessage( &msg );
		}
		
		else
        {	
			mTimer.tick();

			if( !mAppPaused )
				updateScene(mTimer.getDeltaTime());	
			else
				Sleep(50);

			drawScene();
        }
    }
	return (int)msg.wParam;
}

void D3DApp::initApp()
{
	initMainWindow();
	initDirect3D();

	D3DX10_FONT_DESC fontDesc;
	fontDesc.Height          = 24;
    fontDesc.Width           = 0;
    fontDesc.Weight          = 0;
    fontDesc.MipLevels       = 1;
    fontDesc.Italic          = false;
    fontDesc.CharSet         = DEFAULT_CHARSET;
    fontDesc.OutputPrecision = OUT_DEFAULT_PRECIS;
    fontDesc.Quality         = DEFAULT_QUALITY;
    fontDesc.PitchAndFamily  = DEFAULT_PITCH | FF_DONTCARE;
    wcscpy(fontDesc.FaceName, L"Times New Roman");

	D3DX10CreateFontIndirect(md3dDevice, &fontDesc, &mFont);
}
 
void D3DApp::onResize()
{
	

	ReleaseCOM(mRenderTargetView);
	ReleaseCOM(mDepthStencilView);
	ReleaseCOM(mDepthStencilBuffer);


	// Resize the swap chain and recreate the render target view.

	HR(mSwapChain->ResizeBuffers(1, mClientWidth, mClientHeight, DXGI_FORMAT_R8G8B8A8_UNORM, 0));
	ID3D10Texture2D* backBuffer;
	HR(mSwapChain->GetBuffer(0, __uuidof(ID3D10Texture2D), reinterpret_cast<void**>(&backBuffer)));
	HR(md3dDevice->CreateRenderTargetView(backBuffer, 0, &mRenderTargetView));
	ReleaseCOM(backBuffer);


	// Create the depth/stencil buffer and view.

	D3D10_TEXTURE2D_DESC depthStencilDesc;
	
	depthStencilDesc.Width     = mClientWidth;
	depthStencilDesc.Height    = mClientHeight;
	depthStencilDesc.MipLevels = 1;
	depthStencilDesc.ArraySize = 1;
	depthStencilDesc.Format    = DXGI_FORMAT_D24_UNORM_S8_UINT;
	depthStencilDesc.SampleDesc.Count   = 1; // multisampling must match
	depthStencilDesc.SampleDesc.Quality = 0; // swap chain values.
	depthStencilDesc.Usage          = D3D10_USAGE_DEFAULT;
	depthStencilDesc.BindFlags      = D3D10_BIND_DEPTH_STENCIL;
	depthStencilDesc.CPUAccessFlags = 0; 
	depthStencilDesc.MiscFlags      = 0;

	HR(md3dDevice->CreateTexture2D(&depthStencilDesc, 0, &mDepthStencilBuffer));
	HR(md3dDevice->CreateDepthStencilView(mDepthStencilBuffer, 0, &mDepthStencilView));

	md3dDevice->OMSetRenderTargets(1, &mRenderTargetView, mDepthStencilView);
	


	D3D10_VIEWPORT vp;
	vp.TopLeftX = 0;
	vp.TopLeftY = 0;
	vp.Width    = mClientWidth;
	vp.Height   = mClientHeight;
	vp.MinDepth = 0.0f;
	vp.MaxDepth = 1.0f;

	md3dDevice->RSSetViewports(1, &vp);
}

void D3DApp::updateScene(float dt)
{

	static int frameCnt = 0;
	static float t_base = 0.0f;

	frameCnt++;

	// Compute averages over one second period.
	if( (mTimer.getGameTime() - t_base) >= 1.0f )
	{
		float fps = (float)frameCnt; // fps = frameCnt / 1
		float mspf = 1000.0f / fps;

		std::wostringstream outs;   
		outs.precision(6);
		outs << L"FPS: " << fps << L"\n" 
			 << "Milliseconds: Per Frame: " << mspf;
		mFrameStats = outs.str();
		
		// Reset for next average.
		frameCnt = 0;
		t_base  += 1.0f;
	}
}

void D3DApp::drawScene()
{
	md3dDevice->ClearRenderTargetView(mRenderTargetView, mClearColor);
	md3dDevice->ClearDepthStencilView(mDepthStencilView, D3D10_CLEAR_DEPTH|D3D10_CLEAR_STENCIL, 1.0f, 0);
}

LRESULT D3DApp::msgProc(UINT msg, WPARAM wParam, LPARAM lParam)
{
	switch( msg )
	{
	case WM_ACTIVATE:
		if( LOWORD(wParam) == WA_INACTIVE )
		{
			mAppPaused = true;
			mTimer.stop();
		}
		else
		{
			mAppPaused = false;
			mTimer.start();
		}
		return 0;

	// WM_SIZE is sent when the user resizes the window.  
	case WM_SIZE:
		// Save the new client area dimensions.
		mClientWidth  = LOWORD(lParam);
		mClientHeight = HIWORD(lParam);
		if( md3dDevice )
		{
			if( wParam == SIZE_MINIMIZED )
			{
				mAppPaused = true;
				mMinimized = true;
				mMaximized = false;
			}
			else if( wParam == SIZE_MAXIMIZED )
			{
				mAppPaused = false;
				mMinimized = false;
				mMaximized = true;
				onResize();
			}
			else if( wParam == SIZE_RESTORED )
			{
				
				// Restoring from minimized state?
				if( mMinimized )
				{
					mAppPaused = false;
					mMinimized = false;
					onResize();
				}

				else if( mMaximized )
				{
					mAppPaused = false;
					mMaximized = false;
					onResize();
				}
				else if( mResizing )
				{
			
					
				}
				else // API call such as SetWindowPos or mSwapChain->SetFullscreenState.
				{
					onResize();
				}
			}
		}
		return 0;

	case WM_ENTERSIZEMOVE:
		mAppPaused = true;
		mResizing  = true;
		mTimer.stop();
		return 0;

	case WM_EXITSIZEMOVE:
		mAppPaused = false;
		mResizing  = false;
		mTimer.start();
		onResize();
		return 0;
 
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;

	case WM_MENUCHAR:
        
        return MAKELRESULT(0, MNC_CLOSE);

	
	case WM_GETMINMAXINFO:
		((MINMAXINFO*)lParam)->ptMinTrackSize.x = 200;
		((MINMAXINFO*)lParam)->ptMinTrackSize.y = 200; 
		return 0;
	}

	return DefWindowProc(mhMainWnd, msg, wParam, lParam);
}


void D3DApp::initMainWindow()
{
	WNDCLASS wc;
	wc.style         = CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc   = MainWndProc; 
	wc.cbClsExtra    = 0;
	wc.cbWndExtra    = 0;
	wc.hInstance     = mhAppInst;
	wc.hIcon         = LoadIcon(0, IDI_APPLICATION);
	wc.hCursor       = LoadCursor(0, IDC_ARROW);
	wc.hbrBackground = (HBRUSH)GetStockObject(NULL_BRUSH);
	wc.lpszMenuName  = 0;
	wc.lpszClassName = L"D3DWndClassName";

	if( !RegisterClass(&wc) )
	{
		MessageBox(0, L"RegisterClass FAILED", 0, 0);
		PostQuitMessage(0);
	}


	RECT R = { 0, 0, mClientWidth, mClientHeight };
    AdjustWindowRect(&R, WS_OVERLAPPEDWINDOW, false);
	int width  = R.right - R.left;
	int height = R.bottom - R.top;

	mhMainWnd = CreateWindow(L"D3DWndClassName", mMainWndCaption.c_str(), 
		WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, width, height, 0, 0, mhAppInst, this); 
	if( !mhMainWnd )
	{
		MessageBox(0, L"CreateWindow FAILED", 0, 0);
		PostQuitMessage(0);
	}

	ShowWindow(mhMainWnd, SW_SHOW);
	UpdateWindow(mhMainWnd);
}

void D3DApp::initDirect3D()
{
	// Fill out a DXGI_SWAP_CHAIN_DESC to describe our swap chain.

	DXGI_SWAP_CHAIN_DESC sd;
	sd.BufferDesc.Width  = mClientWidth;
	sd.BufferDesc.Height = mClientHeight;
	sd.BufferDesc.RefreshRate.Numerator = 60;
	sd.BufferDesc.RefreshRate.Denominator = 1;
	sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
	sd.BufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
	sd.BufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;

	// No multisampling.
	sd.SampleDesc.Count   = 1;
	sd.SampleDesc.Quality = 0;

	sd.BufferUsage  = DXGI_USAGE_RENDER_TARGET_OUTPUT;
	sd.BufferCount  = 1;
	sd.OutputWindow = mhMainWnd;
	sd.Windowed     = true;
	sd.SwapEffect   = DXGI_SWAP_EFFECT_DISCARD;
	sd.Flags        = 0;


	// Create the device.

	UINT createDeviceFlags = 0;
#if defined(DEBUG) || defined(_DEBUG)  
    createDeviceFlags |= D3D10_CREATE_DEVICE_DEBUG;
#endif

	HR( D3D10CreateDeviceAndSwapChain(
			0,                
			md3dDriverType,
			0,                 
			createDeviceFlags, 
			D3D10_SDK_VERSION,
			&sd,
			&mSwapChain,
			&md3dDevice) );

	
	onResize();
}

Sorry about the long code. What do i do about Wndproc?

The example you downloaded looks like it has an error. The name of your windows procedure here is MainWndProc not WndProc. On line 53, WndProc is not declared. Try replacing it with MainWndProc.

The example you downloaded looks like it has an error. The name of your windows procedure here is MainWndProc not WndProc. On line 53, WndProc is not declared. Try replacing it with MainWndProc.

Nope, That's not it... It's the same error with a different name... should i implement code that works that i got from a website?

try declaring a function prototype for your WndProc function above the prototype for InitWindowsApp();

So LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);

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