C# Signature:
[DllImport("user32.dll")]
static extern bool EnumDisplayMonitors(IntPtr hdc, IntPtr lprcClip,
EnumMonitorsDelegate lpfnEnum, IntPtr dwData);
Vb.Net Signature:
<DllImport("user32.dll")> _
Private Shared Function EnumDisplayMonitors(ByVal hdc As IntPtr, ByVal lprcClip As IntPtr, ByVal lpfnEnum As EnumMonitorsDelegate, ByVal dwData As IntPtr) As Boolean
End Function
User-Defined Types:
None.
Notes:
Please add some!
Tips & Tricks:
Please add some!
Sample Code:
delegate bool MonitorEnumDelegate(IntPtr hMonitor, IntPtr hdcMonitor, ref Rect lprcMonitor, IntPtr dwData);
[StructLayout(LayoutKind.Sequential)]
public struct Rect
{
public int left;
public int top;
public int right;
public int bottom;
}
/// <summary>
/// The struct that contains the display information
/// </summary>
public class DisplayInfo
{
public string Availability { get; set; }
public string ScreenHeight { get; set; }
public string ScreenWidth { get; set; }
public Rect MonitorArea { get; set; }
public Rect WorkArea { get; set; }
}
/// <summary>
/// Collection of display information
/// </summary>
public class DisplayInfoCollection : List<DisplayInfo>
{
}
/// <summary>
/// Returns the number of Displays using the Win32 functions
/// </summary>
/// <returns>collection of Display Info</returns>
public DisplayInfoCollection GetDisplays()
{
DisplayInfoCollection col = new DisplayInfoCollection();
EnumDisplayMonitors( IntPtr.Zero, IntPtr.Zero,
delegate (IntPtr hMonitor, IntPtr hdcMonitor, ref Rect lprcMonitor, IntPtr dwData)
{
MonitorInfo mi = new MonitorInfo();
mi.size = (uint)Marshal.SizeOf(mi);
bool success = GetMonitorInfo(hMonitor, ref mi);
if (success)
{
DisplayInfo di = new DisplayInfo();
di.ScreenWidth = (mi.monitor.right - mi.monitor.left).ToString();
di.ScreenHeight = (mi.monitor.bottom - mi.monitor.top).ToString();
di.MonitorArea = mi.monitor;
di.WorkArea = mi.work;
di.Availability = mi.flags.ToString();
col.Add(di);
}
return true;
}, IntPtr.Zero );
return col;
}
Alternative Managed API:
Use System.Windows.Forms.Screen.AllScreens to get an array of all displays on the system.
