bool success = GetMonitorInfo(hMonitor, ref mi);

static extern bool GetMonitorInfo(IntPtr hMonitor, [In, Out] MONITORINFOEX lpmi);

static extern bool GetMonitorInfo(IntPtr hMonitor, [In, Out] MONITORINFO lpmi);

    GetMonitorInfo(hMonitor, ref mon_info);

The GetMonitorInfo function stores information into a MONITORINFOEX structure or a MONITORINFO structure.

    /// The GetMonitorInfo function stores information into a MONITORINFOEX structure or a MONITORINFO structure.

    /// The size, in bytes, of the structure. Set this member to sizeof(MONITORINFOEX) (72) before calling the GetMonitorInfo function.

The GetMonitorInfo function stores information into a MONITORINFOEX structure or a MONITORINFO structure.

    /// The GetMonitorInfo function stores information into a MONITORINFOEX structure or a MONITORINFO structure.

    /// The size, in bytes, of the structure. Set this member to sizeof(MONITORINFOEX) (72) before calling the GetMonitorInfo function.

      /// To get the work area of a monitor other than the primary display monitor, call the GetMonitorInfo function.