Hello, I'm completely new to Directx 11 and I'm trying to implement a depth buffer in my program. Currently this is the result I'm getting when trying to render:

https://dl.dropboxusercontent.com/u/2873587/ZBufferFail.mp4

I've followed 2 different tutorials for depth buffer and it results in the same thing, so I'm starting to think the issue is related to something elsewhere in the code. Problem is, I don't have enough experience to know where to look or where to begin, so attached is my complete main.cpp file and shaders.hlsl.

main.cpp

#include <windows.h>
#include <d3d11.h>
#include <d3dx11.h>
#include <dxerr.h>

#define _XM_NO_INTRINSICS_
#define XM_NO_ALIGNMENT
#include <xnamath.h>

#include <windows.h>
#include <string>
#include <iostream>
#include <cstring>
using namespace std;;

//////////////////////////////////////////////////////////////////////////////////////
//	Global Variables
//////////////////////////////////////////////////////////////////////////////////////
HINSTANCE	g_hInst = NULL;
HWND		g_hWnd = NULL;

ID3D11Buffer*			g_pVertexBuffer;                
ID3D11VertexShader*		g_pVertexShader;         
ID3D11PixelShader*		g_pPixelShader;          
ID3D11InputLayout*		g_pInputLayout; 

ID3D11DepthStencilView* depthStencilView;
ID3D11Texture2D* depthStencilBuffer;

// Define vertex structure
struct POS_COL_VERTEX
{
	XMFLOAT3 Pos;
	XMFLOAT4 Col;
};

// Define vertices of a triangle - screen coordinates -1.0 to +1.0
    POS_COL_VERTEX vertices[] =
    {
         {XMFLOAT3(0.0f, 0.5f, 0.0f), XMFLOAT4(1.0f, 0.0f, 0.0f, 1.0f)},
		 {XMFLOAT3(0.5f, -0.5f, -0.5f), XMFLOAT4(1.0f, 0.0f, 0.0f, 1.0f)},
         {XMFLOAT3(-0.5f, -0.5f, -0.5f), XMFLOAT4(1.0f, 0.0f, 0.0f, 1.0f)},

		 {XMFLOAT3(0.0f, 0.5f, 0.0f), XMFLOAT4(0.0f, 1.0f, 0.0f, 1.0f)},
         {XMFLOAT3(0.5f, -0.5f, 0.5f), XMFLOAT4(0.0f, 1.0f, 0.0f, 1.0f)},
         {XMFLOAT3(0.5f, -0.5f, -0.5f), XMFLOAT4(0.0f, 1.0f, 0.0f, 1.0f)},

		 {XMFLOAT3(0.0f, 0.5f, 0.0f), XMFLOAT4(0.0f, 0.0f, 1.0f, 1.0f)},
         {XMFLOAT3(-0.5f, -0.5f, 0.5f), XMFLOAT4(0.0f, 0.0f, 1.0f, 1.0f)},
		 {XMFLOAT3(0.5f, -0.5f, 0.5f), XMFLOAT4(0.0f, 0.0f, 1.0f, 1.0f)},

		 {XMFLOAT3(0.0f, 0.5f, 0.0f), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},
		 {XMFLOAT3(-0.5f, -0.5f, -0.5f), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},
		 {XMFLOAT3(-0.5f, -0.5f, 0.5f), XMFLOAT4(1.0f, 1.0f, 1.0f, 1.0f)},

		 {XMFLOAT3(0.5f, -0.5f, -0.5f), XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f)},
         {XMFLOAT3(0.5f, -0.5f, 0.5f), XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f)},
		 {XMFLOAT3(-0.5f, -0.5f, -0.5f), XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f)},

		 {XMFLOAT3(-0.5f, -0.5f, -0.5f), XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f)},
         {XMFLOAT3(0.5f, -0.5f, 0.5f), XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f)},
		 {XMFLOAT3(-0.5f, -0.5f, 0.5f), XMFLOAT4(0.5f, 0.5f, 0.5f, 1.0f)}
         
    };

// Rename for each tutorial
char		g_TutorialName[100] = "SWD304 - Tutorial 06 Exercise 01\0";

D3D_DRIVER_TYPE         g_driverType = D3D_DRIVER_TYPE_NULL;
D3D_FEATURE_LEVEL       g_featureLevel = D3D_FEATURE_LEVEL_11_0;
ID3D11Device*           g_pD3DDevice = NULL;
ID3D11DeviceContext*    g_pImmediateContext = NULL;
IDXGISwapChain*         g_pSwapChain = NULL;

ID3D11RenderTargetView* g_pBackBufferRTView = NULL;

float g_clear_colour[4] = {0.8f, 0.8f, 0.8f, 1.0f};

int screen_res[] = {640, 480};

ID3D11Buffer*			g_pConstantBuffer0; 

float redUpdate = 0.0f;
float scaleUpdate = 1.0f;
float xMod = 0.0f;
float yMod = 0.0f;

// Const buffer structs. Pack to 16 bytes. Don't let any single element cross a 16 byte boundary
struct CONSTANT_BUFFER0 
{
	float RedAmount;  	// 4 bytes
	float ScaleAmount; // 4 bytes
	float xModAmount; // 4 bytes
	float yModAmount; // 4 bytes
	XMMATRIX WorldViewProjection; // 64 bytes
	// Total 80
};

int buffer0_size = 80;

// World vars
float world_z = 2.00f;
float world_x = 0.00f;
float world_y = 0.00f;

float world_fieldOfView = 45.00f;
float world_z_min = 0.00f;
float world_z_max = 100.00f;

float x_degrees = 00.00f;
float y_degrees = 00.00f;
float z_degrees = 00.00f;

//////////////////////////////////////////////////////////////////////////////////////
//	Forward declarations
//////////////////////////////////////////////////////////////////////////////////////
HRESULT InitialiseWindow(HINSTANCE hInstance, int nCmdShow);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

HRESULT InitialiseD3D();
void ShutdownD3D();
void RenderFrame(void);
static void Draw();

HRESULT InitialiseGraphics(void);

//////////////////////////////////////////////////////////////////////////////////////
// Entry point to the program. Initializes everything and goes into a message processing 
// loop. Idle time is used to render the scene.
//////////////////////////////////////////////////////////////////////////////////////
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	UNREFERENCED_PARAMETER(hPrevInstance);
	UNREFERENCED_PARAMETER(lpCmdLine);

	if(FAILED(InitialiseWindow(hInstance, nCmdShow)))
	{
		DXTRACE_MSG("Failed to create Window");
		return 0;
	}

	if(FAILED(InitialiseD3D()))
    {
 		DXTRACE_MSG("Failed to create Device");
		return 0;
    }

	if(FAILED(InitialiseGraphics())) 
	{
		DXTRACE_MSG( "Failed to initialise graphics" );
		return 0;
	}


	// Main message loop
	MSG msg = {0};

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

	ShutdownD3D();

	return (int) msg.wParam;
}


//////////////////////////////////////////////////////////////////////////////////////
// Register class and create window
//////////////////////////////////////////////////////////////////////////////////////
HRESULT InitialiseWindow(HINSTANCE hInstance, int nCmdShow)
{
	// Give your app window your own name
	char Name[100] = "Kristian Thomson\0";

	// Register class
	WNDCLASSEX wcex={0};
	wcex.cbSize = sizeof(WNDCLASSEX);
	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = WndProc;
	wcex.hInstance = hInstance;
	wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
//   wcex.hbrBackground = (HBRUSH )( COLOR_WINDOW + 1); // Needed for non-D3D apps
	wcex.lpszClassName = Name;

	if(!RegisterClassEx(&wcex)) return E_FAIL;

	// Create window
	g_hInst = hInstance;
	RECT rc = {0, 0, screen_res[0], screen_res[1]}; 
	AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, FALSE);
	g_hWnd = CreateWindow(	Name, g_TutorialName, WS_OVERLAPPEDWINDOW,
				CW_USEDEFAULT, CW_USEDEFAULT, rc.right - rc.left, 
				rc.bottom - rc.top, NULL, NULL, hInstance, NULL);
	if(!g_hWnd)
		return E_FAIL;

	ShowWindow(g_hWnd, nCmdShow);

	return S_OK;
}

//////////////////////////////////////////////////////////////////////////////////////
// Called every time the application receives a message
//////////////////////////////////////////////////////////////////////////////////////
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	PAINTSTRUCT ps;
	HDC hdc;

	int mouse_x = LOWORD(lParam);
	int mouse_y = HIWORD(lParam);

	float pointX = ((2.0f * (float)mouse_x) / (float) screen_res[0]) - 1.0f;
	float pointY = (((2.0f * (float)mouse_y) / (float) screen_res[1]) - 1.0f) * -1.0f;

	switch(message)
	{
		case WM_PAINT:
			hdc = BeginPaint(hWnd, &ps);
			EndPaint(hWnd, &ps);
			break;

		case WM_DESTROY:
			PostQuitMessage(0);
			break;

		case WM_LBUTTONDOWN:
			vertices[0].Pos.z -= 0.05f;
			vertices[1].Pos.z -= 0.05f;
			vertices[2].Pos.z -= 0.05f;

			//redUpdate += 0.05f;
			//scaleUpdate += 0.05f;
			
			break;

		case WM_RBUTTONDOWN:
			vertices[0].Pos.z += 0.05f;
			vertices[1].Pos.z += 0.05f;
			vertices[2].Pos.z += 0.05f;

			//redUpdate -= 0.05f;
			//scaleUpdate -= 0.05f;
			break;
		
		case WM_MOUSEMOVE:
			//g_clear_colour[0] = pointX;
			//g_clear_colour[1] = pointY;
			//g_clear_colour[2] = (mouse_x/mouse_y)/2;

			//vertices[0].Pos.x = pointX;
			//vertices[0].Pos.y = pointY;

			//vertices[3].Pos.x = pointX;
			//vertices[3].Pos.y = pointY;

			/*if (pointX > 0.0f && pointY > 0.0f) {
				vertices[1].Pos.x = pointX + -0.5f;
				vertices[1].Pos.y = pointY + -0.5f;
			}
			else {
				vertices[1].Pos.x = pointX + 0.5f;
				vertices[1].Pos.y = pointY + 0.5f;
			}*/

			//float xxx = vertices[3].Pos.x;
			break;

		case WM_KEYDOWN: 
			if(wParam == VK_ESCAPE) {
				DestroyWindow(g_hWnd);
				return 0;
			}
			if(wParam == VK_DOWN) {
				yMod -= 0.05f;
				world_z += 0.05f;
				break;
			}
			if(wParam == VK_UP) {
				yMod += 0.05f;
				world_z -= 0.05f;
				break;
			}
			if(wParam == VK_LEFT) {
				xMod -= 0.05f;
				world_x += 0.05f;
				break;
			}
			if(wParam == VK_RIGHT) {
				xMod += 0.05f;
				world_x -= 0.05f;
				break;
			}

			if(wParam == 0x54) {
				xMod += 0.05f;
				x_degrees -= 1.50f;
				break;
			}

			if(wParam == 0x59) {
				xMod += 0.05f;
				x_degrees += 1.50f;
				break;
			}
			if(wParam == 0x47) {
				xMod += 0.05f;
				y_degrees -= 1.50f;
				break;
			}

			if(wParam == 0x48) {
				xMod += 0.05f;
				y_degrees += 1.50f;
				break;
			}
			if(wParam == 0x42) {
				xMod += 0.05f;
				z_degrees -= 1.50f;
				break;
			}

			if(wParam == 0x4E) {
				xMod += 0.05f;
				z_degrees += 1.50f;
				break;
			}
            break;    		
             
		case WM_SIZE:
        if (g_pSwapChain)
        {
            g_pImmediateContext->OMSetRenderTargets(0, 0, 0);

            // Release all outstanding references to the swap chain's buffers.
            g_pBackBufferRTView->Release();

            HRESULT hr;
            // Preserve the existing buffer count and format.
            // Automatically choose the width and height to match the client rect for HWNDs.
            hr = g_pSwapChain->ResizeBuffers(0, 0, 0, DXGI_FORMAT_UNKNOWN, 0);
                                            
            // Perform error handling here!

            // Get buffer and create a render-target-view.
            ID3D11Texture2D* pBuffer;
            hr = g_pSwapChain->GetBuffer(0, __uuidof( ID3D11Texture2D),
                                         (void**) &pBuffer );
            // Perform error handling here!

            hr = g_pD3DDevice->CreateRenderTargetView(pBuffer, NULL,
                                                     &g_pBackBufferRTView);
            // Perform error handling here!
            pBuffer->Release();

            g_pImmediateContext->OMSetRenderTargets(1, &g_pBackBufferRTView, NULL );

            // Set up the viewport.
			//RECT rc;
			//UINT width = rc.right - rc.left;
			//UINT height = rc.bottom - rc.top;

            D3D11_VIEWPORT vp;
            vp.Width = mouse_x;
            vp.Height = mouse_y;
            vp.MinDepth = 0.0f;
            vp.MaxDepth = 1.0f;
            vp.TopLeftX = 0;
            vp.TopLeftY = 0;
            g_pImmediateContext->RSSetViewports( 1, &vp );
        }
		break;

		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
	}

	return 0;
}

//////////////////////////////////////////////////////////////////////////////////////
// Create D3D device and swap chain
//////////////////////////////////////////////////////////////////////////////////////
HRESULT InitialiseD3D()
{
	HRESULT hr = S_OK;

	RECT rc;
	GetClientRect(g_hWnd, &rc);
	UINT width = rc.right - rc.left;
	UINT height = rc.bottom - rc.top;

	UINT createDeviceFlags = 0;

#ifdef _DEBUG
	createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;
#endif

	D3D_DRIVER_TYPE driverTypes[] =
	{
		D3D_DRIVER_TYPE_HARDWARE, // comment out this line if you need to test D3D 11.0 functionality on hardware that doesn't support it
		D3D_DRIVER_TYPE_WARP, // comment this out also to use reference device
		D3D_DRIVER_TYPE_REFERENCE,
	};
	UINT numDriverTypes = ARRAYSIZE(driverTypes);

	D3D_FEATURE_LEVEL featureLevels[] =
	{
		D3D_FEATURE_LEVEL_11_0,
		D3D_FEATURE_LEVEL_10_1,
		D3D_FEATURE_LEVEL_10_0,
	};
	UINT numFeatureLevels = ARRAYSIZE(featureLevels);

	DXGI_SWAP_CHAIN_DESC sd;
	ZeroMemory(&sd, sizeof(sd));
	sd.BufferCount = 1;
	sd.BufferDesc.Width = width;
	sd.BufferDesc.Height = height;
	sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
	sd.BufferDesc.RefreshRate.Numerator = 60;
	sd.BufferDesc.RefreshRate.Denominator = 1;
	sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
	sd.OutputWindow = g_hWnd;
	sd.SampleDesc.Count = 1;
	sd.SampleDesc.Quality = 0;
	sd.Windowed = true;
	sd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;

	for(UINT driverTypeIndex = 0; driverTypeIndex < numDriverTypes; driverTypeIndex++)
	{
		g_driverType = driverTypes[driverTypeIndex];
		hr = D3D11CreateDeviceAndSwapChain(NULL, g_driverType, NULL, 
			createDeviceFlags, featureLevels, numFeatureLevels, 
			D3D11_SDK_VERSION, &sd, &g_pSwapChain, 
			&g_pD3DDevice, &g_featureLevel, &g_pImmediateContext);
		if(SUCCEEDED(hr))
			break;
	}

	if(FAILED(hr))
		return hr;

	// Get pointer to back buffer texture
	ID3D11Texture2D *pBackBufferTexture;
	hr = g_pSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D),
                                      (LPVOID*)&pBackBufferTexture);

	if(FAILED(hr)) return hr;
	
	// Use the back buffer texture pointer to create the render target view
	hr = g_pD3DDevice->CreateRenderTargetView(pBackBufferTexture, NULL,
                                                    &g_pBackBufferRTView);
	pBackBufferTexture->Release();

	if(FAILED(hr)) return hr;

	//Describe our Depth/Stencil Buffer
	D3D11_TEXTURE2D_DESC depthStencilDesc;

	depthStencilDesc.Width     = width;
	depthStencilDesc.Height    = height;
	depthStencilDesc.MipLevels = 1;
	depthStencilDesc.ArraySize = 1;
	depthStencilDesc.Format    = DXGI_FORMAT_D24_UNORM_S8_UINT;
	depthStencilDesc.SampleDesc.Count   = 1;
	depthStencilDesc.SampleDesc.Quality = 0;
	depthStencilDesc.Usage          = D3D11_USAGE_DEFAULT;
	depthStencilDesc.BindFlags      = D3D11_BIND_DEPTH_STENCIL;
	depthStencilDesc.CPUAccessFlags = 0; 
	depthStencilDesc.MiscFlags      = 0;

	g_pD3DDevice->CreateTexture2D(&depthStencilDesc, NULL, &depthStencilBuffer);
	g_pD3DDevice->CreateDepthStencilView(depthStencilBuffer, NULL, &depthStencilView);

	// Set the render target view
	g_pImmediateContext->OMSetRenderTargets(1, &g_pBackBufferRTView, depthStencilView);

	// Set the viewport
	D3D11_VIEWPORT viewport;

	viewport.TopLeftX = 0;
	viewport.TopLeftY = 0;
	viewport.Width = width;
	viewport.Height = height;
	viewport.MinDepth = 0.0f;
	viewport.MaxDepth = 1.0f;

	g_pImmediateContext->RSSetViewports(1, &viewport);


	return S_OK;
}

//////////////////////////////////////////////////////////////////////////////////////
// Clean up D3D objects
//////////////////////////////////////////////////////////////////////////////////////
void ShutdownD3D()
{
	if(g_pVertexBuffer) g_pVertexBuffer->Release();
	if(g_pInputLayout) g_pInputLayout->Release();
	if(g_pVertexShader) g_pVertexShader->Release();
	if(g_pPixelShader) g_pPixelShader->Release();
	
	if(g_pSwapChain) g_pSwapChain->Release();
	if(g_pImmediateContext) g_pImmediateContext->Release();
	if(g_pD3DDevice) g_pD3DDevice->Release();

	if(g_pBackBufferRTView) g_pBackBufferRTView->Release();

	if(g_pConstantBuffer0) g_pConstantBuffer0->Release();

	if(depthStencilView) depthStencilView->Release();
	if(depthStencilBuffer) depthStencilBuffer->Release();
}

// Render frame
void RenderFrame(void)
{
	g_pImmediateContext->ClearRenderTargetView(g_pBackBufferRTView, g_clear_colour);

	g_pImmediateContext->ClearDepthStencilView(depthStencilView, D3D11_CLEAR_DEPTH|D3D11_CLEAR_STENCIL, 1.0f, 0);

	CONSTANT_BUFFER0 cb0_values;

	// Update world view projection
	XMMATRIX projection, world, view;
	XMMATRIX world2;

	world = XMMatrixRotationX(XMConvertToRadians(45));
	world *= XMMatrixRotationY(XMConvertToRadians(45));
	world *= XMMatrixRotationZ(XMConvertToRadians(45));
	world *= XMMatrixTranslation(0, 0 , 5);

	projection = XMMatrixPerspectiveFovLH(XMConvertToRadians(world_fieldOfView), (float)screen_res[0]/(float)screen_res[1], world_z_min, world_z_max);
	view = XMMatrixIdentity();
	view *= XMMatrixTranslation(world_x, world_y , 0);
	cb0_values.WorldViewProjection = world * view * projection;

	// Set vertex buffer 
	UINT stride = sizeof(POS_COL_VERTEX);
	UINT offset = 0;
	g_pImmediateContext->IASetVertexBuffers(0, 1, &g_pVertexBuffer, &stride, &offset);

	// Select which primtive type to use
	g_pImmediateContext->IASetPrimitiveTopology(D3D11_PRIMITIVE_TOPOLOGY_TRIANGLELIST);

	// Draw the vertex buffer to the back buffer
	g_pImmediateContext->Draw(sizeof(vertices), 0);

	// upload the new values for the constant buffer
	g_pImmediateContext->UpdateSubresource(g_pConstantBuffer0, 0, 0, &cb0_values, 0, 0);

	world2 = XMMatrixRotationX(XMConvertToRadians(x_degrees));
	world2 *= XMMatrixRotationY(XMConvertToRadians(y_degrees));
	world2 *= XMMatrixRotationZ(XMConvertToRadians(z_degrees));
	world2 *= XMMatrixTranslation(0, 0.3f, world_z);

	cb0_values.WorldViewProjection = world2 * view * projection;

	g_pImmediateContext->UpdateSubresource(g_pConstantBuffer0, 0, 0, &cb0_values, 0, 0);

	// Draw the vertex buffer to the back buffer
	g_pImmediateContext->Draw(sizeof(vertices), 0);

	// Display what has just been rendered
	g_pSwapChain->Present(0, 0);

	Draw();
}

static void Draw() {
	D3D11_MAPPED_SUBRESOURCE ms;
	g_pImmediateContext->Map(g_pVertexBuffer, NULL, D3D11_MAP_WRITE_DISCARD, NULL, &ms);	// Lock the buffer to allow writing
	memcpy(ms.pData, vertices, sizeof(vertices)); // Copy the data
	g_pImmediateContext->Unmap(g_pVertexBuffer, NULL);	// Unlock the buffer
}

HRESULT InitialiseGraphics()
{
    HRESULT hr = S_OK;

    // Set up and create vertex buffer
    D3D11_BUFFER_DESC bufferDesc;
    ZeroMemory(&bufferDesc, sizeof(bufferDesc));
    bufferDesc.Usage = D3D11_USAGE_DYNAMIC;		// Used by CPU and GPU
    bufferDesc.ByteWidth = sizeof(POS_COL_VERTEX) * sizeof(vertices);	// Total size of buffer, 3 vertices
    bufferDesc.BindFlags = D3D11_BIND_VERTEX_BUFFER;	// Use as a vertex buffer
    bufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;// Allow CPU access
    hr = g_pD3DDevice->CreateBuffer(&bufferDesc, NULL, &g_pVertexBuffer);//Create the buffer

    if(FAILED(hr)) // return error code on failure
    {
         return hr;
    }
	

	// Create constant buffer
	D3D11_BUFFER_DESC constant_buffer_desc;
	ZeroMemory(&constant_buffer_desc, sizeof(constant_buffer_desc));

	constant_buffer_desc.Usage = D3D11_USAGE_DEFAULT;	// Can use UpdateSubresource() to update
	constant_buffer_desc.ByteWidth = buffer0_size;	// MUST be a multiple of 16, calculate from CB struct
	constant_buffer_desc.BindFlags = D3D11_BIND_CONSTANT_BUFFER;// Use as a constant buffer

	hr = g_pD3DDevice->CreateBuffer(&constant_buffer_desc, NULL, &g_pConstantBuffer0);

	if(FAILED(hr)) return hr;

    // Copy the vertices into the buffer
    Draw();

    // Load and compile pixel and vertex shaders - use vs_5_0 to target DX11 hardware only
    ID3DBlob *VS, *PS, *error;
    hr = D3DX11CompileFromFile("shaders.hlsl", 0, 0, "VShader", "vs_4_0", 0, 0, 0, &VS, &error, 0);

    if(error != 0) // check for shader compilation error
    {
        OutputDebugStringA((char*)error->GetBufferPointer());
        error->Release();
        if(FAILED(hr)) // don't fail if error is just a warning
        {
            return hr;
        };
    }


    hr = D3DX11CompileFromFile("shaders.hlsl", 0, 0, "PShader", "ps_4_0", 0, 0, 0, &PS, &error, 0);

    if(error != 0)// check for shader compilation error
    {
        OutputDebugStringA((char*)error->GetBufferPointer());
        error->Release();
        if(FAILED(hr))// don't fail if error is just a warning
        {
            return hr;
        };
    }


    // Create shader objects
    hr = g_pD3DDevice->CreateVertexShader(VS->GetBufferPointer(), VS->GetBufferSize(), NULL, &g_pVertexShader);

    if(FAILED(hr))
    {
        return hr;
    }
    
    hr = g_pD3DDevice->CreatePixelShader(PS->GetBufferPointer(), PS->GetBufferSize(), NULL, &g_pPixelShader);

    if(FAILED(hr))
    {
        return hr;
    }

    // Set the shader objects as active
    g_pImmediateContext->VSSetShader(g_pVertexShader, 0, 0);
    g_pImmediateContext->PSSetShader(g_pPixelShader, 0, 0);
	g_pImmediateContext->VSSetConstantBuffers(0, 1, &g_pConstantBuffer0);

    // Create and set the input layout object
    D3D11_INPUT_ELEMENT_DESC iedesc[] =
    {
      {"POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D11_INPUT_PER_VERTEX_DATA, 0},
      {"COLOR", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, D3D11_INPUT_PER_VERTEX_DATA, 0},
    };

    hr = g_pD3DDevice->CreateInputLayout(iedesc, 2, VS->GetBufferPointer(), VS->GetBufferSize(), &g_pInputLayout);

    if(FAILED(hr))
    {
        return hr;
    }

    g_pImmediateContext->IASetInputLayout(g_pInputLayout);

    return S_OK;
 }

Shaders

cbuffer CBuffer0
{
	float red_fraction; // 4 bytes
	float scale_fraction; // 4 bytes
	float xmod_fraction; // 4 bytes
	float ymod_fraction; // 4 bytes
	matrix WVPMatrix;	// 64 bytes
}


struct VOut
 {
     float4 position : SV_POSITION;
     float4 color : COLOR;
 };

 VOut VShader(float4 position : POSITION, float4 color : COLOR)
 {
     VOut output;

	 //color.r *= red_fraction;
	 //position.x *= scale_fraction;
	 //position.y *= scale_fraction;

	 //position.x += xmod_fraction;
	 //position.y += ymod_fraction;

     //output.position = position;
     output.color = color;

	 //output.color.g = output.position.y;
	 //output.color.b = output.position.x;

	 output.position = mul(WVPMatrix, position);

     return output;
 }


 float4 PShader(float4 position : SV_POSITION, float4 color : COLOR) : SV_TARGET
 {
	 //color.g = position.x;
	 //color.r = position.y;
	 
	 return color;
 }

Thank you very much in advance, I've been stuck on this all day and I have no idea what else to do to fix it.

1. world_z_min cannot be 0. Use 0.1f or something similar.

2.

g_pImmediateContext->Draw(sizeof(vertices), 0); 

sizeof() returns size in bytes, but Draw() call requires number of vertices, use ARRAYSIZE() macro.

1. world_z_min cannot be 0. Use 0.1f or something similar.

2.

g_pImmediateContext->Draw(sizeof(vertices), 0); 

sizeof() returns size in bytes, but Draw() call requires number of vertices, use ARRAYSIZE() macro.

Hey, thanks so much! The min distance was the cause haha, can't believe I missed that one. As for the sizeof, good call, even though it's been working with that method so far.