unit1.~pas

delphi7,通过应用程序主窗体名称获得句柄

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs,
  PsAPI, StdCtrls,
  tlhelp32;

type
  TForm1 = class(TForm)
    btn1: TButton;
    edtProcessName: TEdit;
    mmo1: TMemo;
    btn2: TButton;
    procedure btn1Click(Sender: TObject);
    procedure btn2Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

//uses tlhelp32;
//获得一个进程的所属可执行文件的路径
function  GetExePathByProcessID(PID: DWord): String;
var
  snap: THandle;
  me32: TMODULEENTRY32;
begin
  snap := 0;
  result := '';
  try
    snap := CreateToolhelp32Snapshot(TH32CS_SNAPALL,PID);
    if snap <> 0 then
    begin
      me32.dwSize:= SizeOf(TMODULEENTRY32);
      if Module32First(snap, me32) then
      begin
        if me32.th32ProcessID = PID then
        begin
          result:= me32.szExePath;
          exit;
        end else
        while Module32Next(snap, me32) do
        if me32.th32ProcessID = PID then 
        begin
          result:= me32.szExePath;
          break;
        end;
      end;
    end;
  finally
    CloseHandle(snap);
  end;
end;

// Added by Zhangsk 2009-3-3 14:38:21
function GetMemorySizeByProcessID(PID: DWord): Cardinal;
var
  l_nTmpHandle: HWND;
  l_pPMC: PPROCESS_MEMORY_COUNTERS;
  l_pPMCSize: Cardinal;
begin
  l_pPMCSize := SizeOf(PROCESS_MEMORY_COUNTERS);

  GetMem(l_pPMC, l_pPMCSize);
  l_pPMC^.cb := l_pPMCSize;

  l_nTmpHandle := OpenProcess(PROCESS_ALL_ACCESS, False, PID);

  if (GetProcessMemoryInfo(l_nTmpHandle, l_pPMC, l_pPMCSize)) then
    Result := l_pPMC^.WorkingSetSize
  else
    Result := 0;

  FreeMem(l_pPMC);
end;

function GetPIDByMainFormCaption(MainFormCaption: string): DWORD;
var
  l_nWndHandle: HWND;
begin
  l_nWndHandle := FindWindow(nil, PChar(MainFormCaption));
  if l_nWndHandle = 0 then
  begin
    Result := 0;
    Exit;
  end;
  GetWindowThreadProcessId(l_nWndHandle, @Result);
end;


//http://hi.baidu.com/83925com/blog/item/401e4923e4cd7c489258078d.html
function GetProcessMemorySize(_sProcessName: string; var _nMemSize: Cardinal): Boolean;
var
  l_nWndHandle, l_nProcID, l_nTmpHandle: HWND;
  l_pPMC: PPROCESS_MEMORY_COUNTERS;
  l_pPMCSize: Cardinal;
begin
  //目前是通过目标程序主窗体的caption属性值查找其句柄，然后根据句柄找到进程的PID
  l_nWndHandle := FindWindow(nil, PChar(_sProcessName));

  { TODO -oZhangsk -c : 通过映象名称查找PID 2009-3-3 14:20:28 }

  if l_nWndHandle = 0 then
  begin
    Result := False;
    Exit;
  end;

  l_pPMCSize := SizeOf(PROCESS_MEMORY_COUNTERS);

  GetMem(l_pPMC, l_pPMCSize);
  l_pPMC^.cb := l_pPMCSize;

  GetWindowThreadProcessId(l_nWndHandle, @l_nProcID);
  l_nTmpHandle := OpenProcess(PROCESS_ALL_ACCESS, False, l_nProcID);

  if (GetProcessMemoryInfo(l_nTmpHandle, l_pPMC, l_pPMCSize)) then
      _nMemSize := l_pPMC^.WorkingSetSize
  else
      _nMemSize := 0;

  FreeMem(l_pPMC);

  Result := True;

//GetModuleFileName  
end;

//Beispiel



{$R *.dfm}

procedure TForm1.btn1Click(Sender: TObject);
var
l_nSize: Cardinal;
begin
if (GetProcessMemorySize(edtProcessName.Text, l_nSize)) then
    ShowMessage('Size: ' + IntToStr(l_nSize) + ' byte')
else
    ShowMessage('Error');
end;




procedure TForm1.btn2Click(Sender: TObject);
var
  Pid: DWORD;
  MemorySize: DWORD;
begin
  Pid := GetPIDByMainFormCaption(edtProcessName.Text);
  MemorySize := GetMemorySizeByProcessID(Pid);
end;

end.