方法一：

C++关闭桌面,explorer.exe

#include<Windows.h>
#include <TlHelp32.h>
#include"resource.h"
#pragma warning(disable:4996)
void taskkill(const char * name)
{HANDLE info_handle = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0); //拍摄系统中所有进程的快照if (info_handle == INVALID_HANDLE_VALUE){MessageBox(0, TEXT("获取进程句柄失败！"), TEXT("错误"), 0);return;}PROCESSENTRY32W program_info;program_info.dwSize = sizeof(PROCESSENTRY32W);  //设置结构体大小int bResult = Process32FirstW(info_handle, &program_info); //获取所有进程中第一个进程的信息if (!bResult){MessageBox(0, TEXT("获取进程句柄失败！"), TEXT("错误"), 0);return;}char tmp[MAX_PATH];HANDLE hProcess;while (bResult){wchar_t *pro_name = program_info.szExeFile;wcstombs(tmp, pro_name, MAX_PATH);if (!strcmp(tmp, name)){hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, program_info.th32ProcessID);if (hProcess) {TerminateProcess(hProcess, 0);CloseHandle(hProcess);//OpenProcess打开的也要关闭  }break;}//获得下一个进程的进程信息bResult = Process32Next(info_handle, &program_info);}CloseHandle(info_handle);//关闭句柄
}
int WINAPI WinMain(HINSTANCE h1, HINSTANCE h2, LPSTR cmd, int show)
{taskkill("explorer.exe");
}

方法二：

C++ 一键关闭屏幕

#include <windows.h>
#include "resource.h"LRESULT CALLBACK WindowProc( HWND hwnd,      // handle to windowUINT uMsg,      // message identifierWPARAM wParam,  // first message parameterLPARAM lParam   // second message parameter);int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{// 延时防止双击exe关闭屏幕后，又打开屏幕。关闭屏幕的消息，先于系统的双击消息；Sleep(200);::SendMessage(HWND_BROADCAST, WM_SYSCOMMAND,  SC_MONITORPOWER,  (LPARAM)2);static TCHAR szAppName[] = TEXT("HelloWin");WNDCLASS wndClass;wndClass.style = CS_HREDRAW | CS_VREDRAW;wndClass.lpfnWndProc = WindowProc;wndClass.cbClsExtra = 0;wndClass.cbWndExtra = 0;wndClass.hInstance = hInstance;wndClass.hIcon = LoadIcon(hInstance, (char*)IDI_ICON1);wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);wndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);wndClass.lpszMenuName = NULL;wndClass.lpszClassName = szAppName;if (!RegisterClass(&wndClass)){MessageBox(NULL, TEXT("注册窗口失败!"), TEXT(""), 0);return 0;}HWND hWnd = CreateWindow(szAppName, TEXT("Hello Program"),WS_OVERLAPPEDWINDOW, 0, 0, 0, 0,NULL, NULL, hInstance, NULL);::SendMessage(hWnd, WM_DESTROY, 0, NULL);return 0;
}LRESULT CALLBACK WindowProc( HWND hwnd,      // handle to windowUINT uMsg,      // message identifierWPARAM wParam,  // first message parameterLPARAM lParam   // second message parameter)
{HDC  hdc;PAINTSTRUCT ps;RECT rect;switch (uMsg){case WM_DESTROY:PostQuitMessage(0);return 0;}return DefWindowProc(hwnd, uMsg, wParam, lParam);
}

本程序使用C语言编写，调用的Windows API，所以只能在windows上运行

本程序无界面，启动后直接隐藏/显示桌面图标，运行结束后自动退出

操作系统：windows 10

开发工具：Visual Studio 2019

下面先贴源代码：

#include <stdio.h>
#include <windows.h>
#include <WinUser.h>
#pragma comment( linker, "/subsystem:windows /entry:mainCRTStartup" ) // 设置入口地址//遍历全部子窗口的子窗口 , Z序遍历
HWND findChildWindowHandleByName(HWND parent, int level, TCHAR* winNameBuf)
{HWND child = NULL;HWND hWnd = NULL;TCHAR buf[MAX_PATH];DWORD pid = 0, tid = 0;do {child = FindWindowEx(parent, child, NULL, NULL);int ret = GetWindowText(child, buf, MAX_PATH);buf[ret] = 0;tid = GetWindowThreadProcessId(child, &pid);for (int i = 0; i < level; ++i)printf("\t");printf("%s ,  pid:%d, tid:%d\n", buf, pid, tid);if (memcmp(winNameBuf, buf, sizeof(winNameBuf)) == 0){hWnd = child;return hWnd;}if (child)hWnd = findChildWindowHandleByName(child, level + 1, winNameBuf);if (hWnd != NULL){return hWnd;}} while (child);return NULL;
}//遍历全部 explore 下的窗口 , Z序遍历
HWND findWindowHandleByName(TCHAR* winNameBuf)
{HWND child = NULL;HWND hWnd = NULL;TCHAR buf[MAX_PATH];DWORD pid = 0, tid = 0;do {//查找 Explore 下的一个窗口,若是能找到则根据 Explore 下的child 继续找child = FindWindowEx(NULL, child, NULL, NULL);int ret = GetWindowText(child, buf, MAX_PATH);buf[ret] = 0;tid = GetWindowThreadProcessId(child, &pid);printf("%s ,  pid:%d, tid:%d\n", buf, pid, tid);if (memcmp(winNameBuf, buf, sizeof(winNameBuf)) == 0){hWnd = child;return hWnd;}//遍历子窗口们if (child)hWnd = findChildWindowHandleByName(child, 1, winNameBuf);if (hWnd != NULL){return hWnd;}} while (child);return NULL;
}int main(void)
{HWND hWnd = NULL;HWND hWnd2 = NULL;TCHAR desktopNameBuf[] = { L"FolderView" };		// 桌面句柄名// 遍历桌面句柄hWnd = findWindowHandleByName(desktopNameBuf);if (hWnd != NULL){// 切换显示与隐藏桌面if (IsWindowVisible(hWnd)){ShowWindow(hWnd, SW_HIDE);}else{ShowWindow(hWnd, SW_SHOW);}// 模拟按键 Win+D//Sleep(100);//keybd_event(VK_LWIN, 0, 0, 0);//keybd_event('D', 0, 0, 0);//Sleep(100);//keybd_event(VK_LWIN, 0, KEYEVENTF_KEYUP, 0);//keybd_event('D', 0, KEYEVENTF_KEYUP, 0);}// 根据任务栏类名寻找句柄hWnd = FindWindowEx(NULL, NULL, L"Shell_TrayWnd", NULL);if (hWnd != NULL){// 寻找是否有第二个屏幕的任务栏hWnd2 = FindWindowEx(NULL, NULL, L"Shell_SecondaryTrayWnd", NULL);if (hWnd2 != NULL){// 切换显示与隐藏任务栏if (IsWindowVisible(hWnd)){ShowWindow(hWnd, SW_HIDE);ShowWindow(hWnd2, SW_HIDE);		// 第二屏幕任务栏需单独隐藏}else{ShowWindow(hWnd, SW_SHOW);		// 显示第一屏幕任务栏后，第二屏幕任务栏会自动显示}}}return 0;
}

新程序新增了隐藏任务栏的功能。