Delphi – VCL – VCL Styles – UxTheme – WinAPI


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Detect if an antivirus software is installed in Windows using Delphi Prism

The next code show how detect if an antivirus software is installed in Windows using Delphi Prism (Oxygene) and the WMI.

uses
System,
System.Management,
System.Text;

type
  ConsoleApp = class
    private
      class method AntivirusInstalled() : Boolean;
    public
      class method Main;
  end;

implementation

class method ConsoleApp.Main;
begin
  var returnCode : Boolean := AntivirusInstalled();
  Console.WriteLine("Antivirus Installed " + returnCode.ToString());
  Console.WriteLine();
  Console.Read();
end;

class method ConsoleApp.AntivirusInstalled() : Boolean;
begin
   var wmipathstr :string  := "\\" + Environment.MachineName + "\root\SecurityCenter";//since windows vista you must use the SecurityCenter2 namespace
    try
       var searcher  : ManagementObjectSearcher    := New ManagementObjectSearcher(wmipathstr, "SELECT * FROM AntivirusProduct");
       var instances : ManagementObjectCollection  := searcher.Get();
       result:=(instances.Count > 0);
    except on E: Exception do
      begin
        Console.WriteLine(e.Message);
        Result:=False;
      end;
    end;
end;


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Detect if an antivirus software is installed in Windows using C#

The next code shows how detect if an antivirus software is installed in Windows using C# and the WMI.

using System;
using System.Text;
using System.Management;

namespace ConsoleApplication1
{
  class Program
  {
    public static bool AntivirusInstalled()
    {

      string wmipathstr = @"\\" + Environment.MachineName + @"\root\SecurityCenter";
      try
      {
        ManagementObjectSearcher searcher = new ManagementObjectSearcher(wmipathstr, "SELECT * FROM AntivirusProduct");
        ManagementObjectCollection instances = searcher.Get();
        return instances.Count > 0;
      }

      catch (Exception e)
      {
        Console.WriteLine(e.Message);
      }

      return false;
    } 

    public static void Main(string[] args)
    {
      bool returnCode = AntivirusInstalled();
      Console.WriteLine("Antivirus Installed " + returnCode.ToString());
      Console.WriteLine();
      Console.Read();
    }


  }
}


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Detect If my Delphi application is running under a 64-bit version of Windows.

The next code shows how detect If my Delphi application is running under a 64-bit version of Windows.

uses 
  Windows;

    function IsWow64Process: Boolean;
    type
      TIsWow64Process = function( hProcess: Windows.THandle; var Wow64Process: Windows.BOOL): Windows.BOOL; stdcall;
    var
      IsWow64Process: TIsWow64Process;
      Wow64Process  : Windows.BOOL;
    begin
      Result := False;
      IsWow64Process := GetProcAddress(GetModuleHandle(Windows.kernel32), 'IsWow64Process');
      if Assigned(IsWow64Process) then
      begin
        if not IsWow64Process(GetCurrentProcess, Wow64Process) then
        Raise Exception.Create('Invalid handle');
        Result := Wow64Process;
      end;
    end;


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Using Rijndael Algorithm in Delphi 2007. Net

The next code shows a sample of how use the Rijndael Algorithm in Delphi 2007. Net

uses
   System.Security.Cryptography, 
   System.Text;

type
  TDynamicArrayOfByte = array of Byte;

function Encrypt(StrtoEncrypt, PK: string): TDynamicArrayOfByte; // pk, must be of a string of 32 characters
var
   miRijndael:  Rijndael;
   encrypted:   TDynamicArrayOfByte;
   toEncrypt:   TDynamicArrayOfByte;
   bytPK:       TDynamicArrayOfByte;
   i: integer;
begin
   Result     := nil;
   miRijndael := System.Security.Cryptography.RijndaelManaged.Create;
   try
    toEncrypt :=  System.Text.Encoding.UTF8.GetBytes(StrtoEncrypt);
    bytPK     :=  System.Text.Encoding.UTF8.GetBytes(PK);    
    miRijndael.Key := bytPK;
    miRijndael.GenerateIV;
    encrypted := (miRijndael.CreateEncryptor()).TransformFinalBlock(toEncrypt, 0, Length(toEncrypt));
    setlength(result, Length(miRijndael.IV) + Length(encrypted));

      for i:=0 to Length(miRijndael.IV)-1 do
         result[i] := miRijndael.IV[i];

      for i:=0 to Length(encrypted)-1 do
         result[i + Length(miRijndael.IV)] := encrypted[i];

   finally
      miRijndael.Clear();
   end;
end;

function DesEncrypt(BufferEncrypted: TDynamicArrayOfByte; PK: string): string; //   pk, must be of a string of 32 characters
var
   miRijndael:  Rijndael;
   encrypted:   TDynamicArrayOfByte;
   tempArray:   TDynamicArrayOfByte;
   bytPK:       TDynamicArrayOfByte;
   i : integer;
begin
   Result     := '';
   miRijndael := System.Security.Cryptography.RijndaelManaged.Create;
   setlength(tempArray, Length(miRijndael.IV));
   setlength(encrypted, Length(BufferEncrypted) - Length(miRijndael.IV));
   try
    bytPK     :=  System.Text.Encoding.UTF8.GetBytes(PK);
    miRijndael.Key :=  bytPK;

      for i:=0 to Length(tempArray)-1 do
         tempArray[i] := BufferEncrypted[i];

      for i:=0 to Length(encrypted)-1 do
         encrypted[i] := BufferEncrypted[i + Length(tempArray)];

    miRijndael.IV := tempArray;
    Result :=  System.Text.Encoding.UTF8.GetString((miRijndael.CreateDecryptor()).TransformFinalBlock(encrypted, 0, Length(encrypted)));
   finally
     miRijndael.Clear();
   end;
end;


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How to mark all the instances of a word in a TRichEdit using Delphi

the Nect code shows how to mark all the instances of a word in a TRichEdit using Delphi 


procedure MarkString(RichEdit:TRichEdit;const strtomark : string);
Var
FoundAt : integer;
begin
    FoundAt:=RichEdit.FindText(strtomark,0,maxInt,[stWholeWord]);
    while FoundAt <> -1 do
    begin
             RichEdit.SelStart := FoundAt;
             RichEdit.SelLength := Length(strtomark);
             RichEdit.SelAttributes.Style := [fsBold];
             RichEdit.SelAttributes.Color := clRed;
             RichEdit.SelText :=strtomark;
             FoundAt:=RichEdit.FindText(strtomark,FoundAt + length(strtomark),maxInt,[stWholeWord]);
    end;
end;


procedure UnMarkString(RichEdit:TRichEdit;const strtomark : string);
Var
FoundAt : integer;
begin
    FoundAt:=RichEdit.FindText(strtomark,0,maxInt,[stWholeWord]);
    while FoundAt <> -1 do
    begin
             RichEdit.SelStart := FoundAt;
             RichEdit.SelLength := Length(strtomark);
             RichEdit.SelAttributes.Style := [];
             RichEdit.SelAttributes.Color := clBlack;
             RichEdit.SelText :=strtomark;
             FoundAt:=RichEdit.FindText(strtomark,FoundAt + length(strtomark),maxInt,[stWholeWord]);
    end;
end;


MarkString(RichEdit1,'delphi'); //To Mark a string

UnMarkString(RichEdit1,'delphi'); //To UnMark a string


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List of changes between versions of Delphi (What’s New)

In response to this question asked in stackoverflow leave here a list of changes between versions of Delphi.
Bye.