#include "stdafx.h"
#include <Windows.h>
#include <iostream>
#include <vector>

using namespace std;

HWND hwndNextViewer;
HWND hwnd;
vector<char *> msgs;

LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

namespace Clip {


	void OnClipBoardChange() {

		//Hook ClipBoard
		if (OpenClipboard(hwnd)) {
			HANDLE clipBoardHandle = GetClipboardData(CF_TEXT);
			msgs.push_back((char *)clipBoardHandle);
			for (std::vector<char *>::iterator it = msgs.begin(); it != msgs.end(); it++){
				cout << *it;
			}
		}

		CloseClipboard();
	}

}

int main()
{
	HINSTANCE hInstance = GetModuleHandle(NULL);

	HWND hwnd;
	MSG Msg;
	const char lpcszClassName[] = "messageClass";
	WNDCLASSEX  WindowClassEx;

	ZeroMemory(&WindowClassEx, sizeof(WNDCLASSEX));
	WindowClassEx.cbSize = sizeof(WNDCLASSEX);
	WindowClassEx.lpfnWndProc = WindowProc;
	WindowClassEx.hInstance = hInstance;
	WindowClassEx.lpszClassName = lpcszClassName;

	if (RegisterClassEx(&WindowClassEx) != 0)
	{
		hwnd = CreateWindowEx(0, lpcszClassName, NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, hInstance, NULL);
		if (!hwnd)
		{
			cout << "CreateWindowEx failed: " << GetLastError() << "\n";
		}
	}
	else
	{
		cout << "RegisterClassEx failed: " << GetLastError() << "\n";
	}

	ShowWindow(hwnd, true);
	while (GetMessage(&Msg, NULL, 0, 0) > 0)
	{
		TranslateMessage(&Msg);
		DispatchMessage(&Msg);
	}
	return (int)Msg.wParam;
}



LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	switch (uMsg)
	{
	case WM_CREATE:
		// Add the window to the clipboard viewer chain.
		hwndNextViewer = SetClipboardViewer(hWnd);
		break;
	case WM_DRAWCLIPBOARD:
		Clip::OnClipBoardChange();
		break;
	case WM_CHANGECBCHAIN:
		// If the next window is closing, repair the chain.
		if ((HWND)wParam == hwndNextViewer)
			hwndNextViewer = (HWND)lParam;

		// Otherwise, pass the message to the next link.
		else if (hwndNextViewer != NULL)
			SendMessage(hwndNextViewer, uMsg, wParam, lParam);
		break;
	case WM_DESTROY:
		ChangeClipboardChain(hWnd, hwndNextViewer);
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hWnd, uMsg, wParam, lParam);

	}

	return 0;
}