#include <windows.h>
#include <iostream>
//define all the buttons
#define IDE_TEXT 101
#define IDB_BUTTON1 500
#define IDB_BUTTON2 501
#define IDB_BUTTON3 502
#define IDB_BUTTON4 503
#define IDB_BUTTON5 504
#define IDB_BUTTON6 505
#define IDB_BUTTON7 506
#define IDB_BUTTON8 507
#define IDB_BUTTON9 508
#define IDB_BUTTONANSWER 509
#define IDB_BUTTONADD 510
#define IDB_BUTTONMINUS 511

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

char szClassName[ ] = "WindowsApp";

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 */
    g_hInst=hThisInstance;
    /* The Window structure */
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      
    wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);

    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;                     
    wincl.cbWndExtra = 0;                      
       wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;


    if (!RegisterClassEx (&wincl))
        return 0;

    /* The class is registered, let's create the program*/
    hwnd = CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           "Frantz corporation",       /* 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 */
           );

  
    ShowWindow (hwnd, nFunsterStil);


    while (GetMessage (&messages, NULL, 0, 0))
    {
        
        TranslateMessage(&messages);

        DispatchMessage(&messages);
    }


    return messages.wParam;
}




LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)


{
HDC hdc;
PAINTSTRUCT ps;
RECT rc;
static HWND Button1=0;
static HWND Button2=0;
static HWND Button3=0;
static HWND Button4=0;
static HWND Button5=0;
static HWND Button6=0;
static HWND Button7=0;
static HWND Button8=0;
static HWND Button9=0;
static HWND ButtonAnswer=0;
static HWND ButtonAdd=0;
static HWND ButtonMinus=0;
static HWND ButtonWindow=0;
    switch (message)                  /* handle the messages */
    {
           case WM_CREATE:
                //The following codes will draw all the buttons in calculator
                CreateWindow(
                "Button",
                "1",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                10,80,50,30,
                hwnd,
                (HMENU) IDB_BUTTON1,
                GetModuleHandle(NULL), NULL);
                
                CreateWindow(
                "Button",
                "2",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                70,80,50,30,
                hwnd,
                (HMENU) IDB_BUTTON2,
                GetModuleHandle(NULL), NULL);
                
                CreateWindow(
                "Button",
                "3",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                130,80,50,30,
                hwnd,
                (HMENU) IDB_BUTTON3,
                GetModuleHandle(NULL), NULL);
                
                 Button4=CreateWindow(
                "Button",
                "4",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                10,120,50,30,
                hwnd,
                (HMENU) IDB_BUTTON4,
                GetModuleHandle(NULL), NULL);
                
                Button5=CreateWindow(
                "Button",
                "5",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                70,120,50,30,
                hwnd,
                (HMENU) IDB_BUTTON5,
                GetModuleHandle(NULL), NULL);
                
               
                Button6=CreateWindow(
                "Button",
                "6",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                130,120,50,30,
                hwnd,
                (HMENU) IDB_BUTTON6,
                GetModuleHandle(NULL), NULL);
                
                Button7=CreateWindow(
                "Button",
                "7",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                10,160,50,30,
                hwnd,
                (HMENU) IDB_BUTTON7,
                GetModuleHandle(NULL), NULL);
                
                Button8=CreateWindow(
                "Button",
                "8",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                70,160,50,30,
                hwnd,
                (HMENU) IDB_BUTTON8,
                GetModuleHandle(NULL), NULL);
                
                Button9=CreateWindow(
                "Button",
                "9",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                130,160,50,30,
                hwnd,
                (HMENU) IDB_BUTTON9,
                GetModuleHandle(NULL), NULL);
                
                ButtonAnswer=CreateWindow(
                "Button",
                "Answer",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                80,200,60,30,
                hwnd,
                (HMENU) IDB_BUTTONANSWER,
                GetModuleHandle(NULL), NULL);
                
                ButtonAdd=CreateWindow(
                "Button",
                "+",
                WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
                10,200,50,30,
                hwnd,
                (HMENU) IDB_BUTTONADD,
                GetModuleHandle(NULL), NULL);
                
                
                ButtonWindow=CreateWindow(
                "edit",
                NULL,
                WS_VISIBLE | WS_CHILD,
                80,300,100,20,
                hwnd,
                (HMENU) IDE_TEXT,
                GetModuleHandle(NULL),
                NULL);
                break;
                
           case WM_COMMAND:
                //was a button clicked?
                if( HIWORD( wParam ) == BN_CLICKED )
      {
                //this is where im having trouble
               switch( LOWORD( wParam ) )
                {
               //how do i make 1 show up in text window when i click this?????
                       //textout does not work. 
                       //same thing go with all the other buttons
                case IDB_BUTTON1:
                     hdc=GetDC(hwnd);
                     TextOut(hdc, 80, 300, "1", 1);
                     break;
                     //how do i get the answer to show up?
                     case IDB_BUTTONANSWER:
                          break;
                          }
                               
                        //and also, when i click a button, the window leaves!!    
        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);
            break;
    }

break;
}
}