///////////////////////////////////////////////////////////////
//                                                           //
//  minwin.cpp  -  small windows demo program                //
//                                                           //
//  Creates a movable, resizable window with title and       //
//  system menu, but no contents.                            //
//                                                           //
//  Jim Fawcett, 27 July 1998, modified 15 Sep 1998          //
//  adapted for Visual C++, ver 6.0 from:                    //
//  MFC Internals, Shepard and Wingo, Addison-Wesley, 1996   //
//                                                           //
///////////////////////////////////////////////////////////////

#include <windows.h>

HANDLE hInst;  // handle to current window

//----< process windows messages >-----------------------------

LRESULT CALLBACK WinProc(HWND hWnd, UINT message, 
                              WPARAM wParam, LPARAM lParam) {
  switch(message) {
  case WM_LBUTTONDOWN:
    MessageBox(hWnd,"left mouse button clicked","demo",MB_OK);
    break;
  case WM_DESTROY:
    PostQuitMessage(0);
    break;
  default :
    return(DefWindowProc(hWnd,message, wParam, lParam));
  }
  return (NULL);
}

//----< define and register window "class" >-------------------

BOOL InitApplication(HINSTANCE hInstance) {

// define window data in WNDCLASS struct and register
  WNDCLASS wc;
  wc.style = NULL;                  // default style
  wc.lpfnWndProc = WinProc;         // name of function handling messages
  wc.cbClsExtra  = 0;               // no per-class user-defined data
  wc.cbWndExtra  = 0;               // no per-window user-defined data
  wc.hInstance   = hInstance;       // application attached to this class
  wc.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
  wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
  wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
  wc.lpszMenuName  = NULL;          // menu name
  wc.lpszClassName = "BasicWindow"; // name of this "class"
  return (RegisterClass(&wc));
}

//

//----< create and display window >----------------------------

BOOL InitInstance(HINSTANCE hInstance, int nCmdShow) {

// 
  HWND  hWnd;
  hInst = hInstance;
  hWnd = CreateWindow(
    "BasicWindow",                  // "class" to use when creating
    "CSE691 - Basic Window",       // window title
    WS_OVERLAPPEDWINDOW,            // window style
    CW_USEDEFAULT,                  // default horizontal position
    CW_USEDEFAULT,                  // default vertical position
    CW_USEDEFAULT,                  // default width
    CW_USEDEFAULT,                  // default height
    NULL,                           // no parent window
    NULL,                           // use window class menu
    hInstance,                      // owner of window
    NULL);

  if(!hWnd) return FALSE;
  ShowWindow(hWnd, nCmdShow);
  UpdateWindow(hWnd);
  return (TRUE);
}

//----< collect and dispatch windows messages >----------------

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                   LPSTR lpCmdLine, int nCmdShow) {

  MSG msg;
  if(!hPrevInstance) {                // is this first instance?
    if(!InitApplication(hInstance))   // 
      return (FALSE);                 // can't initialize window
  }
  if(!InitInstance(hInstance, nCmdShow))
    return (FALSE);
  while(GetMessage(&msg, NULL, NULL, NULL)) {
    TranslateMessage(&msg);
    DispatchMessage(&msg);
  }
  return (msg.wParam);
}