#include <windows.h>
#include <d3d8.h>

//----------------------------------------------------------

// Globale variabelen

//----------------------------------------------------------


char g_szNaam[] = "Standaard Applicatie"; 
LPDIRECT3D8	g_pD3D = NULL;
LPDIRECT3DDEVICE8 g_pD3DDevice = NULL;
LPDIRECT3DSURFACE8 g_pD3DBackBuffer = NULL;

//----------------------------------------------------------

// MsgProc()

//----------------------------------------------------------

LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
    switch( msg )
    {
        case WM_DESTROY:
            PostQuitMessage( 0 );
            return 0;

        case WM_PAINT:
            ValidateRect( hWnd, NULL );
            return 0;
    }

    return DefWindowProc( hWnd, msg, wParam, lParam );
}
// Einde MsgProc()


//----------------------------------------------------------

// WinMain()

//----------------------------------------------------------

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
	WNDCLASSEX wcex;

	wcex.cbSize = sizeof(WNDCLASSEX);
	wcex.style = CS_HREDRAW | CS_VREDRAW;
	wcex.lpfnWndProc = MsgProc;
	wcex.cbClsExtra=0;
	wcex.cbWndExtra=0;
	wcex.hInstance = hInstance;
	wcex.hIcon = 0;
	wcex.hCursor = 0;
	wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
	wcex.lpszMenuName = 0;
	wcex.lpszClassName = g_szNaam;
	wcex.hIconSm = 0;

	RegisterClassEx(&wcex);
	
	HWND hWnd = CreateWindow(g_szNaam, g_szNaam,
							WS_POPUP, 
							0,0,800, 600,
							NULL,NULL, hInstance, NULL);

	if (!hWnd)
	{
		return FALSE;
	}
	
	g_pD3D = Direct3DCreate8(D3D_SDK_VERSION);
	
	D3DPRESENT_PARAMETERS d3dpp;

	ZeroMemory( &d3dpp, sizeof(d3dpp) );

	d3dpp.BackBufferWidth = 800;
	d3dpp.BackBufferHeight = 600;
	d3dpp.BackBufferFormat = D3DFMT_A8R8G8B8;
	d3dpp.BackBufferCount = 1;
	d3dpp.MultiSampleType = D3DMULTISAMPLE_NONE;
	d3dpp.SwapEffect = D3DSWAPEFFECT_COPY;
	d3dpp.hDeviceWindow = hWnd;
	d3dpp.Windowed = FALSE;
	d3dpp.EnableAutoDepthStencil = TRUE;
	d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
	d3dpp.Flags = D3DPRESENTFLAG_LOCKABLE_BACKBUFFER;
	d3dpp.FullScreen_RefreshRateInHz = D3DPRESENT_RATE_DEFAULT;
	d3dpp.FullScreen_PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;

	HRESULT r = g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_pD3DDevice);

// Above is where the error occurs, which causes it to go to case D3DERR_INVALIDCALL in the switch statement below:


	switch(r)
	{
	case D3DERR_INVALIDCALL:
		MessageBox(hWnd, "Invalid Call", "Fout", MB_OK);
		OutputDebugString("InvalidCall\n");
		break;
	case D3DERR_NOTAVAILABLE:
		OutputDebugString("NotAvailable\n");
		break;
	case D3DERR_OUTOFVIDEOMEMORY:
		OutputDebugString("NotAvailable\n");
		break;
	default:
		OutputDebugString("Succes!");
		break;
	}

	g_pD3DDevice->GetBackBuffer(0, D3DBACKBUFFER_TYPE_MONO, &g_pD3DBackBuffer);
	
	ShowWindow(hWnd, nShowCmd);
	UpdateWindow(hWnd);

    MSG msg; 
        while( GetMessage( &msg, NULL, 0, 0 ) )
        {
            TranslateMessage( &msg );
            DispatchMessage( &msg );
        }
    
	UnregisterClass( g_szNaam, hInstance );

	g_pD3DBackBuffer->Release();
	g_pD3DBackBuffer = NULL;

	g_pD3DDevice->Release();
	g_pD3DDevice = NULL;

	g_pD3D->Release();
	g_pD3D = NULL;

    return TRUE;
} 
// Einde WinMain()