#include <windows.h>


LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);




//   HINSTANCE
// INSTANCE OF THE APPLICATION
// ID for application which is passed by the operating system
// se necesita usar para crear ventanas


// LPSTR ARGS
// LPSTR type definition for characters
// args commandline arguments these are the argumments passed into program in the commandline



// ncmdshow takes care of some commandline stuff tells us how windows should be displayed

int WINAPI WinMain(HINSTANCE hInst , HINSTANCE hPrevInst, LPSTR args, int ncmdshow)
{

    WNDCLASSW wc = {0};
    wc.hbrBackground = (HBRUSH)COLOR_WINDOW;
    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
    wc.hInstance = hInst;
    wc.lpszClassName = L"claseVentana";
    wc.lpfnWndProc = WindowProcedure;


    if(!RegisterClassW(&wc))
        return -1;


    CreateWindowW(L"claseVentana", L"Titulo ventana", WS_OVERLAPPEDWINDOW | WS_VISIBLE,100,100,500,500, NULL, NULL, NULL, NULL);


              MSG msg = {0};
    while(GetMessage(&msg,NULL,NULL,NULL))
    {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
    }


    /* event driven programming system, takes care of all the tasks
     that window has to perform, whenever you interact with the window
     like you press a button message is sent to the message loop and the message
     loop processes the msg & sends the msg to the window procedure and the
     window procedure takes care of the message and takes the required action
     on the window */

    return 0;
}
// hWnd identifies the window, window handler
/* HWND is the handler by which the message has been sent, by which window
handler the msg has been sent so it basically identifies the window, window handler*/

/* UINT == unsigned integer is the msg which has been sent ; todo learn about the parameters
which are also required in the processing of the messages, */
LRESULT CALLBACK WindowProcedure(HWND hWnd, UINT msg, WPARAM wp, LPARAM lp){
    switch(msg){
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProcW(hWnd,msg,wp,lp);
    }

}