C/C++ Windows API——获取鼠标位置的窗口句柄

- 日理万妓 2022-11-27 01:54 766阅读 0赞

[https://blog.csdn.net/chy555chy/article/details/52900785][https_blog.csdn.net_chy555chy_article_details_52900785]

<code>// SpyDemo.cpp : 定义控制台应用程序的入口点。
 //
 
 #include "stdafx.h"
 #include <Windows.h>
 
 #define MAX_TEXT_LEN 255
 
 BOOL CALLBACK EnumChildProcess(HWND hwnd, LPARAM lParam)
 {
 if (hwnd == NULL) {
 return FALSE;
 }
 BOOL ret;
 RECT rect;
 ret = GetWindowRect(hwnd, &rect);
 if (!ret) {
 printf("GetWindowRect hwnd=%p -> fail(%ld)\n", hwnd, GetLastError());
 }
 else {
 //printf("GetWindowRect hwnd = %p -> rect=(left=%ld, top=%ld, right=%ld, bottom=%ld)\n", hwnd, rect.left, rect.top, rect.right, rect.bottom);
 ret = PtInRect(&rect, *(POINT *)lParam);
 if (ret) {
 printf("GetWindowRect hwnd = %p -> rect=(left=%ld, top=%ld, right=%ld, bottom=%ld)\n", hwnd, rect.left, rect.top, rect.right, rect.bottom);
 //printf("PtInRect\n");
 
 /*
 WINUSERAPI int WINAPI GetWindowText(
 _In_ HWND hWnd,
 _Out_writes_(nMaxCount) LPTSTR lpString, //可能是标题名或者file:///打头的文件完整路径
 _In_ int nMaxCount
 );
 如果函数成功，返回值是拷贝的字符串的字符个数，不包括中断的空字符；如果窗口无标题栏或文本，或标题栏为空，或窗口或控制的句柄无效，则返回值为零。若想获得更多错误信息，请调用GetLastError函数。
 */
 TCHAR windowText[MAX_TEXT_LEN];
 int lenRet = GetWindowText(hwnd, windowText, MAX_TEXT_LEN);
 if (lenRet == 0 && GetLastError() != 0) {
 //GetLastError()〖0〗-操作成功完成
 printf("GetWindowText hwnd=%p -> fail(%ld)\n", hwnd, GetLastError());
 }
 else {
 _tprintf(_T("GetWindowText hwnd=%p -> windowText=%s, lenRet=%d\n"), hwnd, windowText, lenRet);
 }
 
 /*
 WINUSERAPI int WINAPI GetClassNameW(
 _In_ HWND hWnd,
 _Out_writes_to_(nMaxCount, return) LPWSTR lpClassName,
 _In_ int nMaxCount
 );
 
 如果函数成功，返回值为拷贝到指定缓冲区的字符个数：如果函数失败，返回值为0。若想获得更多错误信息，请调用GetLastError函数。
 */
 TCHAR className[MAX_TEXT_LEN];
 lenRet = GetClassName(hwnd, className, MAX_TEXT_LEN);
 if (lenRet == 0) {
 printf("GetClassName hwnd=%p -> fail(%ld)\n", hwnd, GetLastError());
 }
 else {
 _tprintf(_T("GetClassName hwnd=%p -> className=%s, lenRet=%d\n"), hwnd, className, lenRet);
 }
 
 /*
 找出某个窗口的创建者（线程或进程），返回创建者的标志符
 哪个线程创建了这个窗口,返回的就是这个线程的id号 （进程只有一个线程的话，那么线程标志符与进程标志符就是指同一个标志符）
 WINUSERAPI DWORD WINAPI GetWindowThreadProcessId(
 _In_ HWND hWnd,
 _Out_opt_ LPDWORD lpdwProcessId //进程号的存放地址（变量地址）
 );
 返回线程号
 */
 DWORD dwProcessId;
 DWORD dwThreadId = GetWindowThreadProcessId(hwnd, &dwProcessId);
 printf("GetWindowThreadProcessId hwnd=%p -> processId=%ld, threadId=%ld\n", hwnd, dwProcessId, dwThreadId);
 
 /*
 WINUSERAPI UINT WINAPI GetWindowModuleFileName(
 _In_ HWND hwnd,
 _Out_writes_to_(cchFileNameMax, return) LPTSTR pszFileName, //模块完整路径
 _In_ UINT cchFileNameMax
 );
 返回值是复制到缓冲区的字符总数。
 */
 TCHAR fileName[MAX_PATH];
 lenRet = GetWindowModuleFileName(hwnd, fileName, MAX_PATH);
 if (lenRet == 0) {
 //错误码〖126〗-找不到指定的模块。
 printf("GetWindowModuleFileName hwnd=%p -> fail(%ld)\n", hwnd, GetLastError());
 } else {
 _tprintf(_T("GetWindowModuleFileName hwnd=%p -> fileName=%s\n"), hwnd, fileName);
 }
 
 /*
 WINUSERAPI BOOL WINAPI GetWindowInfo(
 _In_ HWND hwnd,
 _Inout_ PWINDOWINFO pwi
 );
 
 typedef struct tagWINDOWINFO
 {
 DWORD cbSize;
 RECT rcWindow;
 RECT rcClient;
 DWORD dwStyle;
 DWORD dwExStyle;
 DWORD dwWindowStatus;
 UINT cxWindowBorders;
 UINT cyWindowBorders;
 ATOM atomWindowType;
 WORD wCreatorVersion;
 } WINDOWINFO, *PWINDOWINFO, *LPWINDOWINFO;
 */
 WINDOWINFO windowInfo;
 windowInfo.cbSize = sizeof(WINDOWINFO);
 ret = GetWindowInfo(hwnd, &windowInfo);
 if (!ret) {
 printf("GetWindowInfo hwnd=%p -> fail(%ld)\n", hwnd, GetLastError());
 }
 else {
 printf("GetWindowInfo hwnd=%p -> dwStyle=%ld, dwExStyle=%ld, dwWindowStatus=%ld, cxWindowBorders=%d, cyWindowBorders=%d, wCreatorVersion=%d\n", hwnd, windowInfo.dwStyle, windowInfo.dwExStyle, windowInfo.dwWindowStatus, windowInfo.cxWindowBorders, windowInfo.cyWindowBorders, windowInfo.wCreatorVersion);
 }
 printf("\n");
 }
 }
 
 return TRUE;
 }
 
 int main()
 {
 BOOL ret;
 while (true) {
 /*
 typedef struct tagPOINT
 {
 LONG x;
 LONG y;
 } POINT, *PPOINT, NEAR *NPPOINT, FAR *LPPOINT;
 */
 POINT point;
 ret = GetCursorPos(&point);
 if (!ret) {
 printf("GetCursorPos -> fail(%ld)\n", GetLastError());
 }
 else {
 printf("GetCursorPos -> (%ld, %ld)\n", point.x, point.y);
 
 //获取桌面句柄
 HWND desktopHwnd = GetDesktopWindow();
 
 /*
 BOOL EnumChildWindows(
 HWND hWndParent, // handle to parent window // 父窗口句柄
 WNDENUMPROC lpEnumFunc, // callback function // 回调函数的地址
 LPARAM lParam // application-defined value // 你自已定义的参数
 );
 直到调用到最个一个子窗口被枚举或回调函数返回一个false，否则将一直自动枚举下去。
 */
 ret = EnumChildWindows(desktopHwnd, EnumChildProcess, (LPARAM)&point);
 }
 
 /*
 WINBASEAPI VOID WINAPI Sleep(
 _In_ DWORD dwMilliseconds
 );
 Sleep会将线程挂起，把CPU让给其它线程，单位是毫秒
 */
 Sleep(20000);
 }
 
 system("pause");
 return 0;
 }</code>

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![这里写图片描述][20161023114132398]

在评论里有人说道，可以用“WindowFromPoint”来实现这个功能，于是就有了下列代码。

<code>// SpyDemo.cpp : Defines the entry point for the console application.
 //
 
 #include "stdafx.h"
 #include <Windows.h>
 
 int main()
 {
 BOOL ret;
 UINT count;
 /*
 typedef struct tagPOINT
 {
 LONG x;
 LONG y;
 } POINT, *PPOINT, NEAR *NPPOINT, FAR *LPPOINT;
 */
 POINT point;
 TCHAR pszFileName[MAX_PATH];
 TCHAR lpClassName[MAX_PATH];
 TCHAR windowText[MAX_PATH];
 while(true) {
 ret = GetCursorPos(&point);
 if (!ret) {
 printf("GetCursorPos -> fail(%ld)\n", GetLastError());
 } else {
 printf("GetCursorPos -> (%ld, %ld)\n", point.x, point.y);
 HWND hwnd = WindowFromPoint(point);
 if (hwnd == NULL || hwnd == INVALID_HANDLE_VALUE) {
 printf("WindowFromPoint point=(%ld, %ld) -> hwnd=%p -> fail(%ld)\n", point.x, point.y, hwnd, GetLastError());
 }
 else {
 printf("WindowFromPoint -> hwnd=%p\n", hwnd);
 
 /*
 检索与指定的窗口句柄关联的模块的完整路径和文件名称
 WINUSERAPI UINT WINAPI GetWindowModuleFileNameW(
 _In_ HWND hwnd,
 _Out_writes_to_(cchFileNameMax, return) LPWSTR pszFileName,
 _In_ UINT cchFileNameMax
 );
 返回值是复制到缓冲区的字符总数。
 */
 count = GetWindowModuleFileName(hwnd, pszFileName, MAX_PATH);
 _tprintf(_T("GetWindowModuleFileName hwnd=%p -> count=%d, fileName=%s\n"), hwnd, count, pszFileName);
 
 /*
 WINUSERAPI int WINAPI GetClassName(
 _In_ HWND hWnd,
 _Out_writes_to_(nMaxCount, return) LPTSTR lpClassName,
 _In_ int nMaxCount
 );
 */
 count = GetClassName(hwnd, lpClassName, MAX_PATH);
 _tprintf(_T("GetClassName hwnd=%p -> count=%d, lpClassName=%s\n"), hwnd, count, lpClassName);
 
 
 count = GetWindowText(hwnd, windowText, MAX_PATH);
 _tprintf(_T("GetWindowText hwnd=%p -> count=%d, lpClassName=%s\n"), hwnd, count, windowText);
 }
 
 //Screen（屏幕坐标）到Client（客户区坐标）的转换。
 ret = ScreenToClient(hwnd, &point);
 if (!ret) {
 printf("ScreenToClient hwnd=%p -> fail(%ld)\n", hwnd, GetLastError());
 }
 else {
 printf("ScreenToClient hwnd=%p -> point=(%ld, %ld)\n", hwnd, point.x, point.y);
 
 //返回父窗口中包含了指定点的第一个子窗口的句柄
 HWND childHwnd = ChildWindowFromPoint(hwnd, point);
 printf("ChildWindowFromPoint hwnd=%p, point=(%ld, %ld) -> childHwnd=%p\n", hwnd, point.x, point.y, childHwnd);
 
 count = GetClassName(hwnd, lpClassName, MAX_PATH);
 _tprintf(_T("GetClassName hwnd=%p -> count=%d, lpClassName=%s\n"), hwnd, count, lpClassName);
 
 count = GetWindowText(hwnd, windowText, MAX_PATH);
 _tprintf(_T("GetWindowText hwnd=%p -> count=%d, lpClassName=%s\n"), hwnd, count, windowText);
 }
 }
 Sleep(5000);
 }
 return 0;
 }</code>

![这里写图片描述][20161029001206738]

但是有一个问题：  
　　为什么 GetWindowModuleFileName 虽然句柄每次都不一样，但是获取到的模块文件路径每次都是一样的当前的路径。  
　　希望有大神能帮我解答一下，感激不尽。

[https_blog.csdn.net_chy555chy_article_details_52900785]: https://blog.csdn.net/chy555chy/article/details/52900785
[20161023114132398]: /images/20221124/f8b372cb9721444fa35ad61ea71b87df.png
[20161029001206738]: /images/20221124/316d8d33f2b24869b194f368e623471e.png