#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
LPCTSTR lpszClass = TEXT("GraphOut");

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdParam, int nCmdShow)
{
 HWND hWnd;
 MSG Message;
 WNDCLASS WndClass;
 g_hInst=hInstance;

 WndClass.cbClsExtra=0;
 WndClass.cbWndExtra=0;
 WndClass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
 WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
 WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
 WndClass.hInstance=hInstance;
 WndClass.lpfnWndProc=WndProc;
 WndClass.lpszMenuName=NULL;
 WndClass.lpszClassName=lpszClass;
 WndClass.style=CS_HREDRAW|CS_VREDRAW;
 RegisterClass(&WndClass);

 hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT
  ,NULL,(HMENU)NULL,hInstance,NULL);
 ShowWindow(hWnd,nCmdShow);

 while (GetMessage(&Message,NULL,0,0))
 {
  TranslateMessage(&Message);
  DispatchMessage(&Message);
 }
 return (int)Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT iMessage, WPARAM wParam, LPARAM lParam)
{
 HDC hdc;
 PAINTSTRUCT ps;

 switch(iMessage)
 {
 case WM_DESTROY :
  PostQuitMessage(0);
  return 0;
 case WM_PAINT :
  hdc=BeginPaint(hWnd,&ps);
  SetPixel(hdc,10,10,RGB(255,0,0));
  MoveToEx(hdc,100,100,NULL);
  LineTo(hdc,200,200);
  Rectangle(hdc,300,300,400,400);
  Ellipse(hdc,300,300,400,400);
  EndPaint(hWnd,&ps);
  return 0;
 }
 return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}