LoadLibrary 例子

rdu — Fri, 10 Apr 2009 03:18:00 GMT

// CliConsole.cpp : main project file.
#define _AFXDLL
#include <afx.h>
#include <tchar.h>
#include <iostream>
using namespace System;

bool PrintWndText(IntPtr hwnd, IntPtr lParam){
String ^wndText = Helper::GetWndText(hwnd);
if(wndText){
  Console::WriteLine(wndText);
}
return true;
}

delegate int PrintDelegate(String^, String^);
int main(array<System::String ^> ^args)
{
CallbackDelegate ^callback = gcnew CallbackDelegate(PrintWndText);
WindowsEnumerator ^we = gcnew WindowsEnumerator(callback);
we->DoWork();

HMODULE hLib = LoadLibrary(L"msvcrt.dll");
if(hLib){
  typedef int (*FUNCPTR)(const char*, );
  FARPROC proc = GetProcAddress(hLib,"printf");
  FUNCPTR pFunc = reinterpret_cast<FUNCPTR>(proc);
  if(pFunc){
   using System::Runtime::InteropServices::Marshal;
   Delegate^ ptr = Marshal::GetDelegateForFunctionPointer((IntPtr)pFunc,PrintDelegate::typeid);
   PrintDelegate^ printDelegate = (PrintDelegate^)ptr;
   printDelegate("%s\r\n",L"good man");
  }
}

Console::WriteLine(L"Hello World");
system("pause");
return 0;
}

rdu 2009-04-10 11:18 发表评论

string.format in c++

rdu — Thu, 22 Jan 2009 08:14:00 GMT

C#里面的string.Format用着很爽，可是在C++里面拼字符串好像就不那么便捷了。
对一般内置类型来说，sprintf当能满足大部分需求。而对于自定义类型而言，可以利用stringstream来曲线救国：

#include <sstream>
string foo()
{
    stringstream ss;
    ss << "x:" << _x << "\ty:" << _y;
    return ss.str();
}

当然了，这里_x,_y的类型均需实现了
friend ostream& operator << (ostream& s, ObjClass& m)

----------------华丽的分割线--------------

Input/output string stream class

ios_base		ios		istream		iostream		stringstream
				ostream

stringstream provides an interface to manipulate strings as if they were input/output streams.

ref of stringstream from cplusplus.com

rdu 2009-01-22 16:14 发表评论

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LoadLibrary 例子

string.format in c++