动态获取指定窗口大小 获取鼠标所在窗口的位置，HWND

这段代码测试程序，实现功能动态获取窗口大小，获取鼠标按键消息，获取鼠标所在窗口的位置，大小，窗口句柄
实现原理：

具体解析如下：

GetCursorPos(&pNow) // 获取鼠标当前位置

hwndPointNow = WindowFromPoint(pNow);  // 获取鼠标所在窗口的句柄

::GetWindowThreadProcessId(hwndPointNow, &dwProcessID);//获取窗口PID

GetWindowRect(hwndPointNow, &rect);//获取窗口位置

#define KEY_DOWN(VK_NONAME) ((GetAsyncKeyState(VK_NONAME) & 0x8000) ? 1:0) 获取键值

/************************************************************************************
* filename : main.cpp
* comment : The left mouse button, right pulley, message capture, access to the mouse window handle, window position.
* author : liangqidong <[email protected]>
* History : create by liangqidong @ 2017/09/18
*************************************************************************************/
#include 
#include     //CreateToolhelp32Snapshot
#include 
#include 
using namespace std;

#define KEY_DOWN(VK_NONAME) ((GetAsyncKeyState(VK_NONAME) & 0x8000) ? 1:0) //必要的，我是背下来的   

HWND GetWindowHandleByPID(DWORD dwProcessID)
{
	HWND h = GetTopWindow(0);
	while (h)
	{
		DWORD pid = 0;
		DWORD dwTheardId = GetWindowThreadProcessId(h, &pid);
		if (dwTheardId != 0)
		{
			if (pid == dwProcessID/*your process id*/)
			{
				// here h is the handle to the window  

				if (GetTopWindow(h))
				{
					return h;
				}
				// return h;   
			}
		}
		h = ::GetNextWindow(h, GW_HWNDNEXT);
	}
	return NULL;
}
int main()
{
	HWND hwndNow = GetWindowHandleByPID(13956);
	while (1)
	{
		POINT pNow = { 0, 0 };
		if (GetCursorPos(&pNow))  // 获取鼠标当前位置
		{
			HWND hwndPointNow = NULL;
			DWORD  dwProcessID = 0;
			RECT rect;
			hwndPointNow = WindowFromPoint(pNow);  // 获取鼠标所在窗口的句柄
			::GetWindowThreadProcessId(hwndPointNow, &dwProcessID);
			
			if (13956 == dwProcessID)
			{ 
				GetWindowRect(hwndPointNow, &rect);
				std::cout << "窗口的句柄:" << (int)hwndNow<< std::endl;  // 鼠标所在窗口的句柄
				std::cout << "鼠标所在窗口的句柄:" << (int)hwndPointNow << "ID:" << dwProcessID << std::endl;  // 鼠标所在窗口的句柄
				std::cout << "鼠标所在窗口的top:" << rect.top << std::endl;  // 鼠标所在窗口的句柄
				std::cout << "鼠标所在窗口的bottom:" << rect.bottom << std::endl;  // 鼠标所在窗口的句柄
				std::cout << "鼠标所在窗口的left:" << rect.left << std::endl;  // 鼠标所在窗口的句柄
				std::cout << "鼠标所在窗口的right:" << rect.right << std::endl;  // 鼠标所在窗口的句柄
				std::cout << "鼠标所在窗口的宽:" << rect.right - rect.left << std::endl;  // 鼠标所在窗口的句柄
				std::cout << "鼠标所在窗口的高:" << rect.bottom - rect.top << std::endl;  // 鼠标所在窗口的句柄
				printf("鼠标左键是否按下：");
				if (KEY_DOWN(MOUSE_MOVED))printf("是");
				else printf("否");
				printf("\n");

				printf("鼠标右键是否按下：");
				if (KEY_DOWN(MOUSE_EVENT))printf("是");
				else printf("否");
				printf("\n");

				printf("鼠标滚轮键是否按下：");
				if (KEY_DOWN(MOUSE_WHEELED))printf("是");
				else printf("否");
				printf("\n");
			}
			Sleep(1000);
			system("cls");//清屏   
		
		}
	}
	return 0;
}

有什么缺点请大家指教

具体代码请参考git [email protected]:snippets/2580563.git 点击打开链接