c# - 如何知道鼠标光标是否在桌面屏幕上？

Question

我正在尝试获取鼠标光标是否在桌面屏幕上。这是我的代码:

    [DllImport("user32.dll")]
    public static extern bool GetCursorPos(out Point lpPoint);

    [DllImport("user32.dll")]
    public static extern IntPtr WindowFromPoint(Point Point);

    [DllImport("user32.dll", SetLastError = false)]
    public static extern IntPtr GetDesktopWindow();

    public static bool IsMouseOverDesktop()
    {
        Point mouseCursor;
        GetCursorPos(out mouseCursor);
        return WindowFromPoint(mouseCursor) == GetDesktopWindow();
    }

但它不起作用。当鼠标光标位于桌面上时，WindowFromPoint 和 GetDesktopWindow 返回不同的值。

Answer 1

现在按照我的想法你可以这样解决你的问题:

在您的表单代码中使用此方法。

public bool IsMouseOverDesktop()
{
 bool IsMouseOverDesktop = false;
 if ((Cursor.Position.X > this.Location.X) && ((Cursor.Position.X - this.Location.X) < this.Width) && (Cursor.Position.Y > this.Location.Y) && ((Cursor.Position.Y - this.Location.Y) < this.Height))
  IsMouseOverDesktop = false;
 else
  IsMouseOverDesktop = true;
 return IsMouseOverDesktop;
}

然后在事件中调用此方法并检查鼠标是否在桌面上。