(C++ BuilderX) Hello World program, Win32 API

1. Do 'File | Close all'
2. Do 'File | New | New GUI Application'
3. In the popped-up window, do 'Next | Next', then check the box to add source code, then click 'Finish'
4. Doubleclick 'Untitled1.cpp' (your source code)

include <windows.h>

ifdef __BORLANDC__

pragma argsused

endif

int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
{
  return 0;
}

include <windows.h>

ifdef __BORLANDC__

pragma argsused

endif


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 APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
{
  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,nCmdShow);
  UpdateWindow(hWindow);
  {
    MSG msg;
    while(GetMessage(&msg,0,0,0))
    {
      TranslateMessage(&msg);
      DispatchMessage(&msg);
    }
    return (int)msg.wParam;
  }
  return 0;
}

'Hello world' links

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