mouse_event实现鼠标拖动

c++环境通过mouse_event实现windows系统中鼠标的精确移动。

核心移动代码：

//选中mouse_event(MOUSEEVENTF_LEFTDOWN, 
		0, 
		0,  
		0,
		0); //移动mouse_event(MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE, 
		newpos[0],  //x偏移后的值，偏移后的值若大于65535自动取65535
		newpos[1],  //y偏移后的值
		0,
		0); //释放按键mouse_event(MOUSEEVENTF_LEFTUP, 
		0, 
		0,  
		0,
		0);

移动鼠标功能实现测试代码：

#include <windows.h>#include <stdio.h>#include<iostream>#pragma comment(lib, "user32.lib") using namespace std;void main(){
	//获取鼠标信息
	int aMouseInfo[3];
	SystemParametersInfo(SPI_GETMOUSE,   // Get mouse information
		0,              // Not used
		&aMouseInfo,    // Holds mouse information
		0);             // Not used
	cout << "threshold value1 is " << aMouseInfo[0] << " "
		<< "threshold value2 is" << aMouseInfo[1] << " "
		<< "mouse acceleration is " << aMouseInfo[2] << endl;
	int mousespeed;
	SystemParametersInfo(SPI_GETMOUSESPEED, 0, &mousespeed, 0);
	cout << "mousespeed is " << mousespeed << endl;
	//获取屏幕分辨率
	int screenwidth, screenhight;
	screenwidth = GetSystemMetrics(SM_CXSCREEN);
	screenhight = GetSystemMetrics(SM_CYSCREEN);
	cout << "屏幕分辨率" << screenwidth << " " << screenhight << endl;
	//获取当前坐标位置
	POINT pNow = { 0, 0 };
	GetCursorPos(&pNow);
	cout << "当前坐标：" << pNow.x << ", " << pNow.y << endl;
	int move_x, move_y;
	cout << "输入X偏移" << endl;
	cin >> move_x;
	cout << "输入Y偏移" << endl;
	cin >> move_y;	    
	//鼠标坐标系[(0,65535),(0,65535)]
	//屏幕坐标转换到鼠标坐标  
	int newpos[2];
	newpos[0] = (move_x+ pNow.x+1) * 65536 / screenwidth-1;
	newpos[1] = (move_y+ pNow.y+1) * 65536 / screenhight-1;
	mouse_event(MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE, 
		newpos[0],  //x偏移后的值，偏移后的值若大于65535自动取65535
		newpos[1],  //y偏移后的值
		0,
		0); 
	//获取偏移后坐标
	POINT pNew = { 0, 0 };
	GetCursorPos(&pNew);
	cout <<" 新坐标： " << pNew.x << ", " << pNew.y << endl;
	cout << "X偏移量：" << pNew.x - pNow.x << endl;
	cout << "Y偏移量：" << pNew.y - pNow.y << endl;
	Sleep(500);	  }

参考：
https://docs.microsoft.com/zh-cn/windows/win32/api/winuser/nf-winuser-mouse_event
https://docs.microsoft.com/zh-cn/windows/win32/api/winuser/nf-winuser-systemparametersinfoa