Enumerate Display Monitors : Native Windows Function « Windows « C# / CSharp Tutorial

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C# / CSharp Tutorial » Windows » Native Windows Function 
29.10.3.Enumerate Display Monitors
/*
NET Development for Java Programmers
# By Paul Gibbons
# ISBN: 1-59059-038-4
# 432 pp.
# Published: Jul 2002
*/

 

using System;
using System.Runtime.InteropServices;

StructLayoutLayoutKind.Sequential ) ]
struct Rect
{
  public int left;
  public int top;
  public int right;
  public int bottom;
}

StructLayoutLayoutKind.Sequential ) ]
struct MonitorInfo
{
  public uint size;
  public Rect monitor;
  public Rect work;
  public uint flags;
}

class MainClass
{
  delegate bool MonitorEnumDelegateIntPtr hMonitor,IntPtr hdcMonitor,ref Rect lprcMonitor, IntPtr dwData );

  DllImport"user32.dll" ) ]
  static extern bool EnumDisplayMonitorsIntPtr hdc, IntPtr lprcClip, MonitorEnumDelegate lpfnEnum, IntPtr dwData );

  DllImport"user32.dll" ) ]
  static extern bool GetMonitorInfoIntPtr hmon, ref MonitorInfo mi );
  static bool MonitorEnumIntPtr hMonitor, IntPtr hdcMonitor, ref Rect lprcMonitor,  IntPtr dwData )
  {
    MonitorInfo mi = new MonitorInfo();
    mi.size = (uint)Marshal.SizeOfmi );
    bool success = GetMonitorInfohMonitor, ref mi );

    return true;
  }

  [STAThread]
  static void Main(string[] args)
  {
    MonitorEnumDelegate med = new MonitorEnumDelegateMonitorEnum );
    EnumDisplayMonitorsIntPtr.Zero, IntPtr.Zero, med, IntPtr.Zero );
  }
}
29.10.Native Windows Function
29.10.1.Calling Native DLL Functions
29.10.2.Calling a Function with a Structure Parameter
29.10.3.Enumerate Display Monitors
29.10.4.Get Workstation information
29.10.5.Get Computer name (char * parameter)
29.10.6.Get free disk space
29.10.7.Use native windows function to read file
29.10.8.The windows version information
29.10.9.Get current Active Window
29.10.10.Writing INI file: Write Private Profile String
29.10.11.Reading INI file: Get Private Profile String
29.10.12.GetVersionEx by using kernel32.dll
29.10.13.Get computer name (StringBuilder parameter)
29.10.14.Lock work station
29.10.15.Get Monitor Information
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