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sharksaw40

Member Since 08 Feb 2012
Offline Last Active Feb 15 2012 01:43 AM

Topics I've Started

Unhandled exception when closing directx

08 February 2012 - 11:54 AM

I am learning directx from directxtutorial.com and when I have compiled one of the samples and run it then close it I get an error message saying "Unhandled exception at 0x010a1883 in test.exe: 0xC0000005: Access violation reading location 0x00000000.". What does this mean? I have checked that I have typed out all the code correctly and copied and pasted the sample into VC++ which still gives me the error. I think the function causing the problem is:

void CleanD3D(void)
{
	swapchain->Release();
	dev->Release();
	devcon->Release();
}


There is a yellow arrow next to it (I'm a beginner and I'm not entirely sure what it means but I'm guessing it means there is an error on that line). I assume that the codes not the problem because I got it from a tutorial so it must be a configuration problem. Can someone tell help me find what could be wrong? The rest of the code is below:

#include <windows.h>
#include <windowsx.h>
#include <d3d11.h>
#include <d3dx11.h>
#include <d3dx10.h>
#pragma comment (lib, "d3d11.lib")
#pragma comment (lib, "d3dx11.lib")
#pragma comment (lib, "d3dx10.lib")IDXGISwapChain *swapchain;
ID3D11Device *dev;
ID3D11DeviceContext *devcon;
void InitD3D(HWND hWnd);
void CleanD3D(void);LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
HWND hWnd;WNDCLASSEX wc;
ZeroMemory(&wc, sizeof(WNDCLASSEX));wc.cbSize = sizeof(WNDCLASSEX);
wc.style = CS_HREDRAW |CS_VREDRAW;
wc.lpfnWndProc = WindowProc;
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
wc.lpszClassName = "WindowClass1";
RegisterClassEx(&wc);RECT wr = {0,0,800,600};
AdjustWindowRect(&wr, WS_OVERLAPPEDWINDOW, FALSE);hWnd = CreateWindowEx(NULL, "WindowClass1", "Our first windowed program", WS_OVERLAPPEDWINDOW, 300, 100, wr.right - wr.left, wr.bottom - wr.top, NULL, NULL, hInstance, NULL);
ShowWindow(hWnd, nCmdShow);InitD3D(hWnd);
MSG msg={0};while(TRUE)
{
  if(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
  {
   TranslateMessage(&msg);
   DispatchMessage(&msg);   if(msg.message == WM_QUIT)
	break;
  }
  else
  {
  }
}
	CleanD3D();
return msg.wParam;
}LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wparam, LPARAM lparam)
{
switch(message)
{
case WM_DESTROY:
  {
   PostQuitMessage(0);
   return 0;
  } break;
}
return DefWindowProc(hWnd, message, wparam, lparam);
}void InitD3D(HWND hWnd)
{
DXGI_SWAP_CHAIN_DESC scd;
ZeroMemory(&scd, sizeof(DXGI_SWAP_CHAIN_DESC));scd.BufferCount = 1;
scd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
scd.OutputWindow = hWnd;
scd.SampleDesc.Count = 4;
scd.Windowed = TRUE;
D3D11CreateDeviceAndSwapChain(NULL,
  D3D_DRIVER_TYPE_HARDWARE,
  NULL,
  NULL,
  NULL,
  NULL,
  D3D11_SDK_VERSION,
  &scd,
  &swapchain,
  &dev,
  NULL,
  &devcon);
}[color=#ff0000]void CleanD3D(void)
{
swapchain->Release();
dev->Release();
devcon->Release();
}[/color]

Thanks in advance

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