mysql 删除表中倒数N条数据（最后几条数据）
delete from data where exists (select * from (select id from data order by [id] desc limit 0,4) as a where a.id=data.id);
C++ 操作注册表删除键值
#include <windows.h> #include <stdio.h> int main() { HKEY hKey; //HKEY_CURRENT_USER\test」 if (RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("test"), 0, KEY_SET_VALUE, &hKey) != ERROR_SUCCESS) { puts("RegOpenKeyEx error"); return 1; } ...
C++ 修改系统所有运行窗口标题为******
#include <Windows.h> #include <stdio.h> #include <stdlib.h> typedef BOOL (*LPFNENUMERATEWINDOWCALLBACK)(HWND hWnd); void EnumetareWindows(HWND hWndParent, LPFNENUMERATEWINDOWCALLBACK lpfnCallback) { if (lpfnCallback(hWndParent) == FALSE) { return; } HWND h...
C++ setlocale(LC_ALL,"chs"); //输出中文
include <locale.h>int main(){setlocale(LC_ALL,"chs"); //输出中文}
C++ 批量获取系统运行窗口得标题
#include <Windows.h> #include <stdio.h> #include <stdlib.h> void EnumetareWindows(HWND hWndParent) { char szBuff[512]; GetWindowTextA(hWndParent, szBuff, _countof(szBuff)); printf("%s\n", szBuff); HWND hWndChild = FindWindowEx(hWndParent, NULL, NULL, ...
C++获取系统运行得窗口类
#include <Windows.h> #include <stdio.h> #include <stdlib.h> BOOL CALLBACK WndEnumProc(HWND hWnd, LPARAM lParam) { char szBuff[512]; GetWindowTextA(hWnd, szBuff, _countof(szBuff)); puts(szBuff); return TRUE; } int main() { EnumWindows(WndEnumProc, 0); re...
C++ 隐藏桌面任务栏倒计时3秒恢复
#include <Windows.h> #include <stdio.h> #include <stdlib.h> int main() { HWND hWnd = FindWindow(TEXT("Shell_TrayWnd"), NULL); //非表示 ShowWindow(hWnd, SW_HIDE); Sleep(3000); //表示 ShowWindow(hWnd, SW_SHOW); return 0; }
C++ 模拟打开记事本并拖动窗口移动
#include <windows.h> #include <stdlib.h> #include <math.h> #define PI 3.14 #define NUMBER_OF_ROTATE 3 double DegreeToRadian(double deg) { return deg * (PI / 180.0); } void TurnWindow(HWND hWnd) { int nWidth = GetSystemMetrics(SM_CXSCREEN); int nHeight = GetSystemM...
C++ 打开记事本 并移动窗口位置
#include <windows.h> #include <stdlib.h> BOOL CALLBACK WndEnumProc(HWND hWnd, LPARAM) { char szClassName[256]; ::GetClassNameA(hWnd, szClassName, _countof(szClassName)); if (::lstrcmpiA(szClassName, "NOTEPAD") == 0) { MoveWindow(hWnd, 0, 0, 300, 300, TR...
c++ 获取 Win32API 显示监视器信息
使用 GetMonitorInfo 函数获取显示监视器信息。GetMonitorInfo函数的原型如下BOOL GetMonitorInfo ( In HMONITOR hMonitor, Out LPMONITORINFO lpmi );第一个参数 hMonitor 是显示监视器的句柄，使用 MonitorFromPoint 函数获得。第二个参数 lpmi 是一个指向 MONITORINFO 或 MONITORINFOEX 结构的指针，并从 GetMonitorInfo 函数接收监视器信息。MONITORINFOEX 结构定义如下。typedef struct tagMONIT...
C++ CreateFileMapping 或 MapViewOfFileEx 示例
CreateFileMapping 或 MapViewOfFileEx 示例#include <windows.h> #include <string> #include <winbase.h> #include <iostream> using namespace std; void main() { HANDLE h; CHAR *filename; filename =new CHAR[2500]; wcout<<"enter the file name:&...
