COLORREF SetPixel(_In_  HDC hdc,_In_  int X,_In_  int Y,_In_  COLORREF crColor
);

// INCLUDES ///
#define WIN32_LEAN_AND_MEAN  // just say no to MFC#include <windows.h>   // include all the windows headers
#include <windowsx.h>  // include useful macros
#include <mmsystem.h>  // very important and include WINMM.LIB too!
#include <stdio.h>
#include <stdlib.h>
#include <math.h>// DEFINES // defines for windows
#define WINDOW_CLASS_NAME "WINCLASS1"#define WINDOW_WIDTH  400
#define WINDOW_HEIGHT 400// MACROS /#define KEYDOWN(vk_code) ((GetAsyncKeyState(vk_code) & 0x8000) ? 1 : 0)
#define KEYUP(vk_code)   ((GetAsyncKeyState(vk_code) & 0x8000) ? 0 : 1)// GLOBALS
HWND      main_window_handle = NULL; // globally track main window

HINSTANCE hinstance_app      = NULL; // globally track hinstance
char buffer[80];                     // general printing buffer// FUNCTIONS //
LRESULT CALLBACK WindowProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
// this is the main message handler of the system
PAINTSTRUCT        ps;        // used in WM_PAINT
HDC                hdc;    // handle to a device context
char buffer[80];        // used to print strings// what is the message
switch(msg){    case WM_CREATE: {// do initialization stuff here// return successreturn(0);} break;case WM_PAINT: {// simply validate the window hdc = BeginPaint(hwnd,&ps);     // end paintingEndPaint(hwnd,&ps);// return successreturn(0);} break;case WM_DESTROY: {// kill the application, this sends a WM_QUIT message PostQuitMessage(0);// return successreturn(0);} break;default:break;} // end switch// process any messages that we didn't take care of
return (DefWindowProc(hwnd, msg, wparam, lparam));} // end WinProc// WINMAIN
int WINAPI WinMain(    HINSTANCE hinstance,HINSTANCE hprevinstance,LPSTR lpcmdline,int ncmdshow)
{WNDCLASSEX winclass; // this will hold the class we create
HWND       hwnd;     // generic window handle
MSG           msg;         // generic message
HDC        hdc;      // graphics device context// first fill in the window class stucture
winclass.cbSize         = sizeof(WNDCLASSEX);
winclass.style            = CS_DBLCLKS | CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
winclass.lpfnWndProc    = WindowProc;
winclass.cbClsExtra        = 0;
winclass.cbWndExtra        = 0;
winclass.hInstance        = hinstance;
winclass.hIcon            = LoadIcon(NULL, IDI_APPLICATION);
winclass.hCursor        = LoadCursor(NULL, IDC_ARROW);
winclass.hbrBackground    = (HBRUSH)GetStockObject(BLACK_BRUSH);
winclass.lpszMenuName    = NULL;
winclass.lpszClassName    = WINDOW_CLASS_NAME;
winclass.hIconSm        = LoadIcon(NULL, IDI_APPLICATION);// save hinstance in global
hinstance_app = hinstance;// register the window class
if (!RegisterClassEx(&winclass))return(0);// create the window
if (!(hwnd = CreateWindowEx(NULL,                // extended styleWINDOW_CLASS_NAME,   // class"Pixel Plotting Demo", // titleWS_OVERLAPPEDWINDOW | WS_VISIBLE,0,0,      // initial x,yWINDOW_WIDTH, // initial widthWINDOW_HEIGHT,// initial heightNULL,      // handle to parent NULL,      // handle to menuhinstance,// instance of this applicationNULL)))    // extra creation parms
return(0);// save main window handle
main_window_handle = hwnd;// enter main event loop, but this time we use PeekMessage()
// instead of GetMessage() to retrieve messages
while(TRUE){// test if there is a message in queue, if so get itif (PeekMessage(&msg,NULL,0,0,PM_REMOVE)){ // test if this is a quitif (msg.message == WM_QUIT)break;// translate any accelerator keysTranslateMessage(&msg);// send the message to the window procDispatchMessage(&msg);} // end if// draw some pixels each cycle// get the dc for the windowhdc = GetDC(hwnd);// draw 1000 pixelsfor (int index=0; index < 2000; index++){// get random positionint x = rand()%200;int y = rand()%200;COLORREF color = RGB(rand()%255,rand()%255,rand()%255);SetPixel(hdc, x,y, color);} // end for index// release the dc
      ReleaseDC(hwnd, hdc);// main game processing goes hereif (KEYDOWN(VK_ESCAPE))SendMessage(hwnd, WM_CLOSE, 0,0);} // end while// return to Windows like this
return(msg.wParam);} // end WinMain///