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15 May 09

Visual C++ 實作 DLL 動態連結範例

genewince.blogspot.com/...visual-c-dll-gene.html - Preview

VC DLL

14 Apr 09

Python的進步: ctypes

大部份dll使用ctypes都可以應用得很好，像是我擔心的callback，ctypes一樣可以提供方法來把python的函數包裝成c語言的callback丟給c語言的dll，運作得很好

blog.ez2learn.com/...python-evolution-ctypes - Preview

Python ctypes DLL

07 Apr 09

探訪動態連結函式庫

在Windows 下DLL 通常是以『副檔名為DLL 的檔案』存在，DLL 內可以包含提供外部呼叫的函式、資源（Resource ）以及各種的變數，當DLLs 被應用程式載入時這些DLLs 內含的資料都會變為應用程式所屬行程的一部份

www2.borland.com.tw/...td001018.html - Preview

BCB DLL VC

tdump.exe 工具列出一

個DLL 檔內所有的Section
tdump inputfile outputfile
13 more annotations...
- 你只要在你的應用程式中需要輸出的
  
  函式前頭加上：__declspec(dllexport) 即可，如：
  
  __declspec(dllexport) void Function(void);
  
  這樣一來就會把Function(void) 這個函式給放到輸出
  
  表格上
- 對於自行打造的DLL 中的
  
  輸出函式我們在載用此DLL 的載入端就得在函式
  
  的宣告前面加上__declspec(dllimport) ，如：
  
  __declspec(dllimport) void Function(void);
  
  目的是告訴編譯器Function(void) 這個函式是由外部
  
  輸入的
- 加上extern
  
  “C ” 來遏止name mangling 對我們函式名稱所動的手
  
  腳：
  
  extern “C ” __declspec(dllexport) int MyFunc (void);
- 所謂
  
  靜態載入是指程式在聯結時期即與DLLs 所對應的import
  
  libraries 做靜態鏈結，於是可執行檔中便對所有的DLL
  
  函式都有一份重定位表格(relocation table) 和待修正記
  
  錄(fixup record) 。當程式被Windows 載入器載入記憶體中
  
  ，載入器會自動修正所有的fixup records ，而這個fixup
  
  records 就是記錄由DLL 中所有輸出資源的正確位址
- 若不小心把lib 檔案給刪除掉了，也可以利
  
  用implib.exe 這個C++Builder 所附上的工具來產生lib 檔
- implib
  
  ShowMsg.lib ShowMsg.dll ，這樣就會產生ShowMsg.lib 檔
- #ifdef __DLL__
  
  #define DLLAPI extern "C" __declspec(dllexport)
  
  #else
  
  #define DLLAPI extern "C" __declspec(dllimport)
  
  #endif
- 所謂Explicitly link （顯式聯結）又稱動態載入
  
  ，若是使用動態載入就是需要時才載入DLL ，然
  
  後在使用過後即釋放DLL
- Borland 提供了一個工具IMPLIB.EXE
  
  ，可以直接從任何編譯器所編譯出的DLLs 裡頭將OMF
  
  格式的LIBs 給製造出來
- IMPDEF VC6TEST.DEF VC6TEST.DLL
- ;(Borland name) = (Name exported by Visual C++)
  
  MyFunc_Std = _MyFunc_Std@8
  
  _MyFunc_Cdecl = MyFunc_Cdecl
  
  _MyFunc_Default = MyFunc_Default
- 動過手腳的DEF 檔給還原成LIB 檔：
  
  IMPLIB VC6TEST.lib VC6TEST.def
- 使用TLIB 來觀察最後的test.lib 是否正確輸
  
  出：
  
  TLIB VC6TEST.lib,VC6TEST.txt

Borland C++ Builder - Lesson 06: Using Additional Libraries

A library is a group of functions, classes, or other resources that can be made available to programs that need already implemented entities without the need to know how these functions, classes, or resources were created or how they function.

www.yevol.com/Lesson06.htm - Preview

BCB DLL Lib

There are two broad categories of libraries you will deal with in your programs:
static libraries and dynamic libraries.
A static library created can be used by either a
console application, a Win32 application, or a VCL application. That's one
of its advantages
7 more annotations...
- On the DLL Wizard, click the C++ radio button and only the Use VCL
  check box
- extern "C" __declspec(dllexport)
- To get the DLL ready for use, you will have to import it using the Implib utility.
- extern "C" __declspec(dllimport)void BoxProperties(double L, double H,
  double W, double& A, double& V);
- BoxProperties(Length, Height, Width, Area, Volume);

StraceNT - Strace for Windows

StraceNT is a System Call Tracer for Windows. It provides similar functionality as of strace on Linux.

www.intellectualheaven.com/default.asp - Preview

Windows debug DLL freeware

16 Mar 09

Stdcall and DLL tools of MSVC and MinGW

The __stdcall calling convention has been there for a very long time. While older calling conventions like __pascal fell into oblivion, __stdcall became the standard calling convention of Win32 API functions.

wyw.dcweb.cn/stdcall.htm - Preview

DLL MSVC MinGW

double __cdecl sin(double)
will be decorated as _sin, and double __stdcall sin(double)
will be decorated as _sin@8
The decorations could change when they
appear in DLLs or when they are produced by different compilers.
1 more annotations...
- Calling Convention
  
  Internal^*
  
  MSVC DLL (w/ DEF)
  
  MSVC DLL (dllexport)
  
  DMC DLL
  
  MinGW DLL
  
  BCC DLL
  
  __stdcall
  
  _Function@n
  
  Function
  
  _Function@n
  
  _Function@n
  
  Function@n
  
  Function
  
  __cdecl
  
  _Function
  
  Function
  
  Function
  
  Function
  
  Function
  
  _Function

21 Dec 08

Dependency Walker (depends.exe) Home Page

Dependency Walker is a free utility that scans any 32-bit or 64-bit Windows module (exe, dll, ocx, sys, etc.) and builds a hierarchical tree diagram of all dependent modules. For each module found, it lists all the functions that are exported by that module, and which of those functions are actually being called by other modules

www.dependencywalker.com - Preview

DLL Windows debug freeware

For each module found, it lists all the functions that are exported by
that module, and which of those functions are actually being called by other modules

12 Dec 08

使用ctypes调用kernel32.dll中的函数

book.51cto.com/...58183.htm - Preview

Python ctypes DLL

在Python中由ctypes实现。
class _PROCESS_INFORMATION(Structure):
_fields_ = [('hProcess', c_void_p),
('hThread', c_void_p),
('dwProcessId', c_ulong),
('dwThreadId', c_ulong)]

windows下面的python扩展-win32all 和ctypes

blog.csdn.net/...711115.aspx - Preview

Python ctypes win32 DLL

import win32api   #winapi库
   import win32con   #windows常数定义

   win32api.MessageBox(win32con.NULL, "提示信息", "提示标题", win32con.MB_OK | win32con.MB_ICONINFORMATION)

   输出一个messagbox,标题为"提示标题"，提示文本为"提示信息"，对话框图标为提示图标
import ctypes #cytpes库
import win32con #windows常数定义
msgbox = ctypes.windll.user32.MessageBoxA
msgbox(win32con.NULL, "提示信息", "提示标题", win32con.MB_OK | win32con.MB_ICONINFORMATION)
2 more annotations...
- 不需要指定参数类型也可以调用。可以通过指定参数类型，在调用前进行参数检查。
  msgbox.argtypes = [ctypes.c_int, ctypes.c_char_p, ctypes.c_char_p, ctypes.c_int]
- 函数默认的返回值类型为integer。如果为其他类型，需要通过restype参数指定

Python调用windows下DLL详解

blog.csdn.net/...3075478.aspx - Preview

Python ctypes DLL

stdcall调用约定：两种加载方式

Objdll = ctypes.windll.LoadLibrary("dllpath")

Objdll = ctypes.WinDLL("dllpath")

cdecl调用约定：也有两种加载方式

Objdll = ctypes.cdll.LoadLibrary("dllpath")

Objdll = ctypes.CDLL("dllpath")

其实windll和cdll分别是WinDLL类和CDll类的对象