C#中如何判断鼠标和键盘同时按下?
不是设置两个bool变量,u批以后变false
------解决方案--------------------private void Form1_MouseDown(object sender, MouseEventArgs e) 
 { 
     if (Control.ModifierKeys == Keys.Alt && e.Button == MouseButtons.Left) 
         MessageBox.Show( "Alt+Left "); 
 } 
------解决方案--------------------GetKeyState