Use the dc brush to draw examples of rectangles lines and ellipses

WindowDraw.cpp

#include<Windows.h>
#include<tchar.h>
//Declare window function
LRESULT CALLBACK WindowProc (
       HWND hwnd,
       UINT uMsg,
       WPARAM wParam,
       LPARAM lParam
       );
//The entry function WinMain
int WINAPI WinMain(
     HINSTANCE hInstance,
     HINSTANCE hPrevInstance,
     LPSTR lpCmdLine,
     int nCmdShow
     )
{
 //Define window classes
 WNDCLASS wndclass;
 wndclass.lpfnWndProc=WindowProc;//Specify window function
 wndclass.cbClsExtra=0;
 wndclass.cbWndExtra=0;
 wndclass.style=CS_HREDRAW|CS_VREDRAW;
 wndclass.lpszClassName=_T(" My form ");
 wndclass.hInstance=hInstance;
 wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);//Gets the standard mouse cursor
 wndclass.hIcon=0;
 wndclass.hbrBackground=(HBRUSH)(COLOR_WINDOW+1);
 wndclass.lpszMenuName=0;
 //Register window class
 if(RegisterClass(&wndclass)==0)
 {
  MessageBox(0,_T("Register window class failure "),_T(" My form "),MB_OK);
  return 0;
 }
 //Create the form's real column
 HWND hWnd = CreateWindow(_T(" My form "),_T(" Form drawing "),WS_OVERLAPPEDWINDOW,100,100,500,400,0,0,hInstance,0);
 //Displays and updates forms
 ShowWindow(hWnd,SW_SHOW);
 UpdateWindow(hWnd);
 //Message loop
 MSG msg;
  while(GetMessage(&msg,0,0,0))
  {
   TranslateMessage(&msg);
   DispatchMessage(&msg);
   }
  return 0;
}
//Define the window function
LRESULT CALLBACK WindowProc (
       HWND hwnd,
       UINT uMsg,
       WPARAM wParam,
       LPARAM lParam
       )
{
 switch(uMsg)
 {
 case WM_PAINT://Response plotting message
  {
   PAINTSTRUCT ps;
   //For DC
   HDC hDC = BeginPaint(hwnd,&ps);
   //Create a solid line, width 1, red pen
   HPEN hPen=CreatePen(PS_SOLID,1,RGB(255,0,0));
   //Select the pen into DC
   HPEN hOldPen=(HPEN)SelectObject(hDC,hPen);
   //Draw a red line
   MoveToEx(hDC,10,10,NULL);
   LineTo(hDC,90,50);
   //Create a blue brush
   HBRUSH hBrush = CreateSolidBrush(RGB(0,0,255));
   HBRUSH hOldBrush= (HBRUSH)SelectObject(hDC,hBrush);
   //Draws a rectangle, because I haven't changed my pen, so I'm drawing a rectangle with a red border and a blue area
   Rectangle(hDC,100,100,200,170);
   //Draw an ellipse, because the pen and brush have not changed, so draw a red border, blue area of the ellipse
   Ellipse(hDC,200,230,260,300);
   //The output text
   TextOut(hDC,200,30,_T(" The drawing test "),4);
   //Recovery drawing object
   SelectObject(hDC,hOldPen);
   SelectObject(hDC,hOldBrush);
   //Delete drawing object
   DeleteObject(hPen);
   DeleteObject(hBrush);
   //The release of the DC
   EndPaint(hwnd,&ps);
  }
  break;
 case WM_CLOSE:
  PostQuitMessage(0);
  break;
 default:
  return DefWindowProc(hwnd,uMsg,wParam,lParam);
  }
 return 0;
}