ProcessUnit by Aphex with Example

posted 14 Sep 2010, 19:43 by Delphi Basics   [ updated 17 Oct 2010, 16:03 ]
This ProcessUnit by Aphex uses minimal other units to list basic information about running processes and perform basic tasks such as process termination.

The attached Delphi source code details an example on how to completely utilise ProcessUnit within your Delphi project.


unit ProcessUnit;

{
  Coder: Aphex
  Compiled: Delphi 2007
}

interface

uses
  Windows, TlHelp32;

type
  TProcessManager = class(TObject)
  private
  public
    Count: integer;
    ExePathList: array of string;
    PIDList: array of string;
    PriorityList: array of string;
    ThreadList: array of string;
    constructor Create;
    procedure ListProcesses;
    procedure KillProcessByPID(PID: string);
    procedure KillProcessByExePath(ExePath: string);
  end;

implementation

function IntToStr(X: integer): string;
var
  S: string;
begin
 Str(X, S);
 Result := S;
end;

function StrToInt(S: string): integer;
var
  V, X: integer;
begin
 Val(S, V, X);
 Result := V;
end;

procedure SetTokenPrivileges;
var 
  hToken1, hToken2, hToken3: THandle;
  TokenPrivileges: TTokenPrivileges;
  Version: OSVERSIONINFO;
begin
  Version.dwOSVersionInfoSize := SizeOf(OSVERSIONINFO);
  GetVersionEx(Version);
  if Version.dwPlatformId <> VER_PLATFORM_WIN32_WINDOWS then
  begin
    try
      OpenProcessToken(GetCurrentProcess, TOKEN_ADJUST_PRIVILEGES, hToken1);
      hToken2 := hToken1;
      LookupPrivilegeValue(nil, 'SeDebugPrivilege', TokenPrivileges.Privileges[0].luid);
      TokenPrivileges.PrivilegeCount := 1;
      TokenPrivileges.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED;
      hToken3 := 0;
      AdjustTokenPrivileges(hToken1, False, TokenPrivileges, 0, PTokenPrivileges(nil)^, hToken3);
      TokenPrivileges.PrivilegeCount := 1;
      TokenPrivileges.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED;
      hToken3 := 0;
      AdjustTokenPrivileges(hToken2, False, TokenPrivileges, 0, PTokenPrivileges(nil)^, hToken3);
      CloseHandle(hToken1);
    except;
    end;
  end;
end;

function Split(Input: string; Deliminator: string; Index: integer): string;
var
  StringLoop, StringCount: integer;
  Buffer: string;
begin
  StringCount := 0;
  for StringLoop := 1 to Length(Input) do
  begin
    if (Copy(Input, StringLoop, 1) = Deliminator) then
    begin
      Inc(StringCount);
      if StringCount = Index then
      begin
        Result := Buffer;
        Exit;
      end
      else
      begin
        Buffer := '';
      end;
    end
    else
    begin
      Buffer := Buffer + Copy(Input, StringLoop, 1);
    end;
  end;
  Result := Buffer;
end;

constructor TProcessManager.Create;
begin
  inherited Create;
  SetTokenPrivileges;
end;

procedure TProcessManager.ListProcesses;
var
  Process32: TProcessEntry32;
  Module32: TModuleEntry32;
  ProcessSnapshot: THandle;
  ModuleSnapshot: THandle;
  SystemDirectory: array[0..261] of char;
begin
  Count := -1;
  GetWindowsDirectory(@SystemDirectory, 261);
  ProcessSnapshot := CreateToolHelp32SnapShot(TH32CS_SNAPALL, 0);
  Process32.dwSize := SizeOf(TProcessEntry32);
  Process32First(ProcessSnapshot, Process32);
  repeat
    Inc(Count);
    SetLength(ExePathList, Count + 1);
    SetLength(ThreadList, Count + 1);
    SetLength(PIDList, Count + 1);
    SetLength(PriorityList, Count + 1);
    ModuleSnapshot := CreateToolHelp32SnapShot(TH32CS_SNAPMODULE, Process32.th32ProcessID);
    Module32.dwSize := SizeOf(TModuleEntry32);
    Module32First(ModuleSnapshot, Module32);
    if Copy(string(Module32.szExePath), 1, 4) = '\??\' then
    begin
      ExePathList[Count] := Copy(string(Module32.szExePath), 5, Length(string(Module32.szExePath)) - 4);
    end
    else if Copy(string(Module32.szExePath), 1, 11) = '\SystemRoot' then
    begin
      ExePathList[Count] := string(SystemDirectory) + Copy(string(Module32.szExePath), 12, Length(string(Module32.szExePath)) - 11);
    end
    else
    begin
      ExePathList[Count] := string(Module32.szExePath);
    end;
    ThreadList[Count] := IntToStr(Process32.cntThreads);
    if Process32.th32ProcessID = 0 then
    begin
      PIDList[Count] := IntToStr(GetCurrentProcessID);
    end
    else
    begin
        PIDList[Count] := IntToStr(Process32.th32ProcessID);
    end;
    PriorityList[Count] := IntToStr(Process32.pcPriClassBase);
    CloseHandle(ModuleSnapshot);
  until not (Process32Next(ProcessSnapshot, Process32));
  CloseHandle(ProcessSnapshot);
end;

procedure TProcessManager.KillProcessByExePath(ExePath: string);
var
  iLoop: integer;
begin
  ListProcesses;
  for iLoop := 0 to Count do
  begin
    if ExePath = ExePathList[iLoop] then
    begin
      KillProcessByPID(PIDList[iLoop]);
    end;
  end;
end;

procedure TProcessManager.KillProcessByPID(PID: string);
var
  ProcessHandle: THandle;
begin
  ProcessHandle := OpenProcess(PROCESS_TERMINATE, False, StrToInt(PID));
  TerminateProcess(ProcessHandle, 0);
end;

end.

Only Delphi source code is included in the archive.
ċ
AphexProcessUnitExample.rar
(18k)
Delphi Basics,
29 Sep 2010, 06:32
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