First version

README.md

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-# screensaver-disabler
-Windows ScreenSaver Disabler
+# Windows ScreenSaver Disabler
+
+Does your organization enforce a policy of password protected screensaver kicking-in
+every five minutes, and you can't change it? If so, this utility is for you.
+
+Some programs like the Windows Media Player, or PowerPoint in presentation mode 
+prevent triggering the screensaver. With good reason. But you may be doing 
+something else like reading documents on the screen while taking hand notes, or 
+demoing something and you want to prevent the screen-saver-password disruptions.
+
+Look to the source code to integrate this functionality in your own applications.
+Please take a look to the win32 API function [SetThreadExecutionState](https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-setthreadexecutionstate).
+
+
+        [FlagsAttribute]
+        public enum EXECUTION_STATE : uint
+        {
+            ES_AWAYMODE_REQUIRED = 0x00000040,
+            ES_CONTINUOUS = 0x80000000,
+            ES_DISPLAY_REQUIRED = 0x00000002,
+            ES_SYSTEM_REQUIRED = 0x00000001
+            // Legacy flag, should not be used.
+            // ES_USER_PRESENT = 0x00000004
+        }
+
+        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+        static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);
+		
+
+This program is written in C# for NET Framework 7, and will run in 32 and 64 bit Windows 10 systems.

ScreenSaverDisabler.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.28307.1000
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ScreenSaverDisabler", "ScreenSaverDisabler\ScreenSaverDisabler.csproj", "{B2382AE5-8EBF-4C30-925E-F4534E292D3D}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{B2382AE5-8EBF-4C30-925E-F4534E292D3D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B2382AE5-8EBF-4C30-925E-F4534E292D3D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B2382AE5-8EBF-4C30-925E-F4534E292D3D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B2382AE5-8EBF-4C30-925E-F4534E292D3D}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {3C342EC7-A4EE-4858-9998-1042F2447E34}
+	EndGlobalSection
+EndGlobal

ScreenSaverDisabler/App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7" />
+    </startup>
+</configuration>

ScreenSaverDisabler/Form1.cs

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+using System;
+using System.Runtime.InteropServices;
+using System.Windows.Forms;
+
+namespace Monon
+{
+
+    public partial class FormMain : Form
+    {
+
+        [FlagsAttribute]
+        public enum EXECUTION_STATE : uint
+        {
+            ES_AWAYMODE_REQUIRED = 0x00000040,
+            ES_CONTINUOUS = 0x80000000,
+            ES_DISPLAY_REQUIRED = 0x00000002,
+            ES_SYSTEM_REQUIRED = 0x00000001
+            // Legacy flag, should not be used.
+            // ES_USER_PRESENT = 0x00000004
+        }
+
+        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
+        static extern EXECUTION_STATE SetThreadExecutionState(EXECUTION_STATE esFlags);
+
+        public FormMain()
+        {
+            InitializeComponent();
+        }
+
+        private void keepOnSw_CheckedChanged(object sender, EventArgs e)
+        {
+            prevent_screensaver(keepOnSw.Checked);
+        }
+
+        private void prevent_screensaver(bool sw)
+        {
+            if (sw) 
+            {
+                SetThreadExecutionState(EXECUTION_STATE.ES_DISPLAY_REQUIRED | EXECUTION_STATE.ES_CONTINUOUS);
+            }
+            else
+            {
+                SetThreadExecutionState(EXECUTION_STATE.ES_CONTINUOUS);
+            }
+        }
+
+        private void FormMain_Load(object sender, EventArgs e)
+        {
+            keepOnSw.Checked = true;
+        }
+
+        private void FormMain_FormClosed(object sender, FormClosedEventArgs e)
+        {
+            prevent_screensaver(false);
+        }
+
+    }
+}

ScreenSaverDisabler/Form1.resx

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+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>

ScreenSaverDisabler/Program.cs

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+using System;
+using System.Windows.Forms;
+
+namespace Monon
+{
+    static class Program
+    {
+        /// <summary>
+        /// Application entry point
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new FormMain());
+        }
+    }
+}

ScreenSaverDisabler/Properties/AssemblyInfo.cs

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+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// La información general de un ensamblado se controla mediante el siguiente 
+// conjunto de atributos. Cambie estos valores de atributo para modificar la información
+// asociada con un ensamblado.
+[assembly: AssemblyTitle("ScreenSaverDisabler")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("ScreenSaverDisabler")]
+[assembly: AssemblyCopyright("Copyright © Pedro López-Cabanillas 2020")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Si establece ComVisible en false, los tipos de este ensamblado no estarán visibles 
+// para los componentes COM.  Si es necesario obtener acceso a un tipo en este ensamblado desde 
+// COM, establezca el atributo ComVisible en true en este tipo.
+[assembly: ComVisible(false)]
+
+// El siguiente GUID sirve como id. de typelib si este proyecto se expone a COM.
+[assembly: Guid("b2382ae5-8ebf-4c30-925e-f4534e292d3d")]
+
+// La información de versión de un ensamblado consta de los cuatro valores siguientes:
+//
+//      Versión principal
+//      Versión secundaria
+//      Número de compilación
+//      Revisión
+//
+// Puede especificar todos los valores o utilizar los números de compilación y de revisión predeterminados
+// mediante el carácter '*', como se muestra a continuación:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]