#include <windows.h>

/*  Declara el procedimiento WindowProcedure  */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);

/*  Make the class name into a global variable  */
char szClassName[ ] = "HolaMundo";

int WINAPI WinMain (HINSTANCE hThisInstance,
                   HINSTANCE hPrevInstance,
                   LPSTR lpszArgument,
                   int nFunsterStil)

{
   HWND hwnd;               /* This is the handle for our window */
   MSG messages;            /* Here messages to the application are saved */
   WNDCLASSEX wincl;        /* Data structure for the windowclass */

   /* The Window structure */
   wincl.hInstance = hThisInstance;
   wincl.lpszClassName = szClassName;
   wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
   wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
   wincl.cbSize = sizeof (WNDCLASSEX);

   /* Use default icon and mouse-pointer */
   wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
   wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
   wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
   wincl.lpszMenuName = NULL;                 /* No menu */
   wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
   wincl.cbWndExtra = 0;                      /* structure or the window instance */
   /* Use Windows's default color as the background of the window */
   wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;

   /* Register the window class, and if it fails quit the program */
   if (!RegisterClassEx (&wincl))
       return 0;

   /* The class is registered, let's create the program*/
   hwnd = CreateWindowEx (
          0,                   /* Extended possibilites for variation */
          szClassName,         /* Classname */
          "Hola Mundo",       /* Title Text */
          WS_OVERLAPPEDWINDOW, /* default window */
          CW_USEDEFAULT,       /* Windows decides the position */
          CW_USEDEFAULT,       /* where the window ends up on the screen */
          544,                 /* The programs width */
          375,                 /* and height in pixels */
          HWND_DESKTOP,        /* The window is a child-window to desktop */
          NULL,                /* No menu */
          hThisInstance,       /* Program Instance handler */
          NULL                 /* No Window Creation data */
          );

   /* Make the window visible on the screen */
   ShowWindow (hwnd, nFunsterStil);

   /* Run the message loop. It will run until GetMessage() returns 0 */
   while (GetMessage (&messages, NULL, 0, 0))
   {
       /* Translate virtual-key messages into character messages */
       TranslateMessage(&messages);
       /* Send message to WindowProcedure */
       DispatchMessage(&messages);
   }

   /* The program return-value is 0 - The value that PostQuitMessage() gave */
   return messages.wParam;
}


/*  This function is called by the Windows function DispatchMessage()  */

LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
   switch (message)                  /* handle the messages */
   {
       case WM_DESTROY:
           PostQuitMessage (0);       /* send a WM_QUIT to the message queue */
           break;
       default:                      /* for messages that we don't deal with */
           return DefWindowProc (hwnd, message, wParam, lParam);
   }

   return 0;
}