C/C++ 遍歷窗口標題類名

遍歷每個進程，一次查找進程下的窗口，找到窗口標題為 “” ，窗口類名為 “RunDll” 的窗口。如果找到返回 true ，沒找到返回 false。

#pragma region 依賴

typedef struct EnumHWndsArg{
	std::vector<HWND> *vecHWnds;
	DWORD dwProcessId;
}EnumHWndsArg, *LPEnumHWndsArg;

// 判斷窗口是否屬於目標進程
BOOL CALLBACK lpEnumFunc(HWND hwnd, LPARAM lParam){
	EnumHWndsArg *pArg = (LPEnumHWndsArg)lParam;
	DWORD  processId;

	// 檢索窗口線程標識符
	GetWindowThreadProcessId(
		hwnd,			// 窗口句柄
		&processId		// 接收 PID 的指針
		);

	// 如果這個 HWND 屬於這個 PID ，則加入到 vecHWnds 數組末尾
	if (processId == pArg->dwProcessId){pArg->vecHWnds->push_back(hwnd);}

	return TRUE;
}

// 根據 PID 獲取 HWND
void GetHWndsByProcessID(DWORD processID, std::vector<HWND> &vecHWnds){
	EnumHWndsArg wi;
	wi.dwProcessId = processID;
	wi.vecHWnds = &vecHWnds;

	// 枚舉所有頂級窗口
	EnumWindows(
		lpEnumFunc,		// 回調函數指針
		(LPARAM)&wi		// 傳遞給回調函數的值
		);
}

#pragma endregion

bool CSOL_dh()
{
	HANDLE hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
	PROCESSENTRY32 process = {sizeof(PROCESSENTRY32)};
	
	// 遍歷進程
	while (Process32Next(hProcessSnap,&process)){
		string processName = process.szExeFile;		// 進程名
		std::vector<HWND> vecHWnds;					// 進程下的窗體句柄數組
		GetHWndsByProcessID(process.th32ProcessID,vecHWnds);
		
		// 獲取 HWND 窗口標題、窗口類名
		TCHAR szBuf_title[MAX_PATH];
		TCHAR szBuf_class[MAX_PATH];
		for (const HWND &h : vecHWnds){
			GetWindowText(
			h,					// 窗口句柄
			szBuf_title,		// 接收窗口標題的緩沖區指針
			MAX_PATH			// 緩沖區字節大小
			);
			GetClassName(
			h,					// 窗口句柄
			szBuf_class,		// 接收窗口類名的緩沖區指針
			MAX_PATH			// 緩沖區字節大小
			);

			// 判斷是否有符合要求的窗體
			if(strcmp(szBuf_title,"") == 0 && strcmp(szBuf_class,"RunDLL") == 0){
				return true;
			}
			
			// 輸出結果	
			//cout << "szBuf_title = " << szBuf_title << endl;
			//cout << "szBuf_class = " << szBuf_class << endl;
			//cout << "--------------------------------------------" << endl;
		}

	}
	
	return false;
}

API——獲取鼠標位置的窗口句柄

#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,    //可能是標題名或者file:///打頭的文件完整路徑
            _In_ int nMaxCount
            );
            如果函數成功，返回值是拷貝的字符串的字符個數，不包括中斷的空字符；如果窗口無標題欄或文本，或標題欄為空，或窗口或控制的句柄無效，則返回值為零。若想獲得更多錯誤信息，請調用GetLastError函數。
            */
            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
            );

            如果函數成功，返回值為拷貝到指定緩沖區的字符個數：如果函數失敗，返回值為0。若想獲得更多錯誤信息，請調用GetLastError函數。
            */
            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);
            }

            /*
            找出某個窗口的創建者（線程或進程），返回創建者的標志符
            哪個線程創建了這個窗口,返回的就是這個線程的id號 （進程只有一個線程的話，那么線程標志符與進程標志符就是指同一個標志符）
            WINUSERAPI DWORD WINAPI GetWindowThreadProcessId(
                _In_ HWND hWnd,
                _Out_opt_ LPDWORD lpdwProcessId //進程號的存放地址（變量地址）
            );
            返回線程號
            */
            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, //模塊完整路徑
                _In_ UINT cchFileNameMax
            );
            返回值是復制到緩沖區的字符總數。
            */
            TCHAR fileName[MAX_PATH];
            lenRet = GetWindowModuleFileName(hwnd, fileName, MAX_PATH);
            if (lenRet == 0) {
                //錯誤碼〖126〗-找不到指定的模塊。
                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);

            //獲取桌面句柄
            HWND desktopHwnd = GetDesktopWindow();

            /*
            BOOL EnumChildWindows(
                HWND hWndParent,         // handle to parent window // 父窗口句柄
                WNDENUMPROC lpEnumFunc,  // callback function // 回調函數的地址
                LPARAM lParam            // application-defined value // 你自已定義的參數
            );
            直到調用到最個一個子窗口被枚舉或回調函數返回一個false，否則將一直自動枚舉下去。
            */
            ret = EnumChildWindows(desktopHwnd, EnumChildProcess, (LPARAM)&point);
        }

        /*
        WINBASEAPI VOID WINAPI Sleep(
            _In_ DWORD dwMilliseconds
        );
        Sleep會將線程掛起，把CPU讓給其它線程，單位是毫秒
        */
        Sleep(20000);
    }

    system("pause");
    return 0;
}