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#include<windows.h>

#include<d3d9.h>

#include<d3dx9.h>

int int_AppRunning = 1;

LRESULT CALLBACK OurWindowProcedure(HWND han_Wind,UINT uint_Message,WPARAM parameter1,LPARAM parameter2)
{
    switch(uint_Message)
    {
        case WM_KEYDOWN:
        {
            int_AppRunning = 0;
            break;
        }
        break;
    }

    return DefWindowProc(han_Wind,uint_Message,parameter1,parameter2);
}

HWND NewWindow(LPCTSTR str_Title,int int_XPos, int int_YPos, int int_Width, int int_Height)
{
    WNDCLASSEX wnd_Structure;

    wnd_Structure.cbSize = sizeof(WNDCLASSEX);
    wnd_Structure.style = CS_HREDRAW | CS_VREDRAW;
    wnd_Structure.lpfnWndProc = OurWindowProcedure;
    wnd_Structure.cbClsExtra = 0;
    wnd_Structure.cbWndExtra = 0;
    wnd_Structure.hInstance = GetModuleHandle(NULL);
    wnd_Structure.hIcon = NULL;
    wnd_Structure.hCursor = NULL;
    wnd_Structure.hbrBackground = GetSysColorBrush(COLOR_BTNFACE);
    wnd_Structure.lpszMenuName = NULL;
    wnd_Structure.lpszClassName = "WindowClassName";
    wnd_Structure.hIconSm = LoadIcon(NULL,IDI_APPLICATION);

    RegisterClassEx(&wnd_Structure);

    return CreateWindowEx(WS_EX_CONTROLPARENT, "WindowClassName", str_Title, WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX | WS_VISIBLE, int_XPos, int_YPos, int_Width, int_Height, NULL, NULL, GetModuleHandle(NULL), NULL);
}



 LPDIRECT3DDEVICE9 InitializeDevice(HWND han_WindowToBindTo)
 {
     LPDIRECT3D9 p_dx_Object;
     LPDIRECT3DDEVICE9 p_dx_Device;
 
     p_dx_Object = Direct3DCreate9(D3D_SDK_VERSION);
     if (p_dx_Object == NULL)
     {
         MessageBox(han_WindowToBindTo,"DirectX Runtime library not installed!","InitializeDevice()",MB_OK);
     }
 
     D3DPRESENT_PARAMETERS dx_PresParams;
  ZeroMemory( &dx_PresParams, sizeof(dx_PresParams) );
  dx_PresParams.Windowed = TRUE;
  dx_PresParams.SwapEffect = D3DSWAPEFFECT_DISCARD;
  dx_PresParams.BackBufferFormat = D3DFMT_UNKNOWN;
 
  if (FAILED(p_dx_Object->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, han_WindowToBindTo, D3DCREATE_HARDWARE_VERTEXPROCESSING, &dx_PresParams, &p_dx_Device)))
  {
         if (FAILED(p_dx_Object->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_REF, han_WindowToBindTo, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &dx_PresParams, &p_dx_Device)))
         {
             MessageBox(han_WindowToBindTo,"Failed to create even the reference device!","InitializeDevice()",MB_OK);
         }
  }
 
     return p_dx_Device;
 }
 

 int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPreviousInstance,LPSTR lpcmdline,int nCmdShow)
 {
     MSG msg_Message;
 
     HWND han_Window = NewWindow("DirectX C++ Tutorial",100,100,500,500);

     LPDIRECT3DDEVICE9 p_Device = InitializeDevice(han_Window);

 
     while(int_AppRunning)
     {
         if(PeekMessage(&msg_Message,han_Window,0,0,PM_REMOVE))
         {
             DispatchMessage(&msg_Message);
         }
     }
 

     p_Device->Release();

     DestroyWindow(han_Window);
 
     return 0;
 }