(Win32 API) Hello world program

Note: to run this program, your MUST have your programming environment set to a Win32 API application. In other words:

NOT to a console application
NOT to a VCL or CLX application.

include <windows>

include <condefs.h>


LRESULT CALLBACK myWndProc(HWND hWindow, UINT msg, WPARAM wParam, LPARAM lParam)
{
  if (msg==WM_PAINT)
  {
    PAINTSTRUCT ps;
    const HDC hDC = BeginPaint(hWindow,&ps);
    RECT rect;
    GetClientRect(hWindow,&rect);
    DrawText(hDC,TEXT("HELLO WORLD"),-1,&rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
    EndPaint(hWindow,&ps);
    return 0;
  }
  else if (msg==WM_DESTROY)
  {
    PostQuitMessage(0);
    return 0;
  }
  return DefWindowProc(hWindow,msg,wParam,lParam);
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
  const static TCHAR appName[] = TEXT("Hello world");
  WNDCLASSEX myWin;
  myWin.cbSize = sizeof(myWin);
  myWin.style = CS_HREDRAW | CS_VREDRAW;
  myWin.lpfnWndProc = myWndProc;
  myWin.cbClsExtra = 0;
  myWin.cbWndExtra = 0;
  myWin.hInstance = hInstance;
  myWin.hIcon = 0;
  myWin.hIconSm  = 0;
  myWin.hCursor = 0;
  myWin.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
  myWin.lpszMenuName = 0;
  myWin.lpszClassName = appName;
  //Register
  if (!RegisterClassEx(&myWin)) return 0;
  const HWND hWindow = CreateWindow(
    appName,
    appName,
    WS_OVERLAPPEDWINDOW,
    CW_USEDEFAULT,
    CW_USEDEFAULT,
    CW_USEDEFAULT,
    CW_USEDEFAULT,
    0,
    0,
    hInstance,
    0);
  ShowWindow(hWindow,iCmdShow);
  UpdateWindow(hWindow);
  {
    MSG msg;
    while(GetMessage(&msg,0,0,0))
    {
      TranslateMessage(&msg);
      DispatchMessage(&msg);
    }
    return (int)msg.wParam;
  }
}

'Hello world' links

Code links

last edited (May 20, 2007) by bilderbikkel, Number of views: 6808, Current Rev: 12 (Diff)

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