#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <windowsx.h>
#include "resource.h"
#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <mmsystem.h>

/////////////////////////////////////GLOBALS//////////////////////////////////////////////////

int WindowCounter=0;   //Globally tracks the number of Windows

int SparehInstance=NULL; //Globally tracks the ýnstance of application


///////////////////////////////////CONSTANTS//////////////////////////////////////////////////

const char* const WindowName="One of My Windows"; //Caption of Windows

const char* const ClassName="Myclass";            //Name of WindowClass


/////////////////////////////////////////////////////////////////////////////////////////////

LRESULT CALLBACK WinProc(HWND hwnd,UINT msg,WPARAM wparam,LPARAM lparam)
{
	PAINTSTRUCT ps;
	HDC hdc;
	switch(wparam)
	{
	case WM_CREATE:
		{
			++WindowCounter;
			return 0;
		}
		break;
	case WM_ACTIVATE:
		{
			HDC TempHdc=GetDC(hwnd);  //Get a new hdc

			char buffer[60];          //Create a buffer(array of char)

			SetBkColor(TempHdc,RGB(rand()%255,rand()%255,rand()%255));   //Arrange the fore and

			SetTextColor(TempHdc,RGB(rand()%255,rand()%255,rand()%255)); // back colors

			switch(LOWORD(wparam))
			{
			case WA_ACTIVE:
				{
					strcmp(buffer,"Window is Activated");
					TextOut(TempHdc,50,50,buffer,strlen(buffer));
					ReleaseDC(hwnd,TempHdc);
					return 0;
				}
				break;
			case WA_CLICKACTIVE:
				{
					strcmp(buffer,"Windows is Activated by Mouse");
					TextOut(TempHdc,50,50,buffer,strlen(buffer));
					ReleaseDC(hwnd,TempHdc);
					return 0;
				}
				break;
			case WA_INACTIVE:
				{
					strcmp(buffer,"Window is Deactivated");
					TextOut(TempHdc,50,50,buffer,strlen(buffer));
					ReleaseDC(hwnd,TempHdc);
					return 0;
				}
				break;
			}
			return 0;
		}
		break;
	case WM_PAINT:
		{
			
			hdc=BeginPaint(hwnd,&ps);
			EndPaint(hwnd,&ps);
			return 0;
		}
		break;
	case WM_CLOSE:
		{
			int Answer=NULL;
			Answer=MessageBox(hwnd,"Are You Sure","Sure?",MB_YESNO);
			switch(Answer)
			{
			case (IDYES):
				{
					PostMessage(hwnd,WM_DESTROY,0,0);
					return 0;
				}
				break;
			case (IDNO):
				{
					return 0;
				}
				break;
			}
			return 0;
		}
	case WM_DESTROY:
		{
			-- WindowCounter;
			if(WindowCounter<=0)
			{
				PostQuitMessage(0);
				return 0;
			}
			else
			{
				return (DefWindowProc(hwnd,msg,wparam,lparam));
			}
			return 0;
		}
		break;
	}
	return (DefWindowProc(hwnd,msg,wparam,lparam));
}


int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
{
	WNDCLASSEX myclass;
	MSG msg;
	HWND hwnd;
	myclass.cbClsExtra=0;
	myclass.cbSize=sizeof(WNDCLASSEX);
	myclass.cbWndExtra=0;
	myclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
	myclass.hCursor=LoadCursor(hInstance,MAKEINTRESOURCE(IDC_CURSOR1));
	myclass.hIcon=LoadIcon(hInstance,MAKEINTRESOURCE(IDI_ICON1));
	myclass.hIconSm=LoadIcon(hInstance,MAKEINTRESOURCE(IDI_ICON1));
	myclass.hInstance=hInstance;
	myclass.lpfnWndProc=WinProc;
	myclass.lpszClassName=ClassName;
	myclass.lpszMenuName=NULL;
	myclass.style=CS_HREDRAW|CS_VREDRAW|CS_OWNDC|CS_DBLCLKS;
	if(!(RegisterClassEx(&myclass)))
	{
		MessageBox(NULL,"Class Registration Error","Registration Error",MB_OK);
		return 0;
	}
	if(!(hwnd=CreateWindowEx(NULL,ClassName,WindowName,WS_OVERLAPPEDWINDOW|WS_VISIBLE,30,30,330,330,
		NULL,NULL,hInstance,NULL)))
	{
		MessageBox(hwnd,"Class Creation Error","Creation Error",MB_OK);
		return 0;
	}
	while(TRUE)
	{
		if(PeekMessage(&msg,hwnd,0,0,PM_REMOVE))
		{
			if(msg.message==WM_QUIT)
			{
				return 0;
			}
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}
	return (msg.wParam);
}