C / C++ / MFC

Flaviu 2 wrote:

I try to read all ODBC installed on , with this sample , as with modify follow target :
#define IS_KEY _T("SOFTWARE\\ODBC\\ODBCINST.INI")
but it didn't function

Flaviu 2 wrote:

what I didn't understand on this sample is

<SPAN class=code-preprocessor>#define</SPAN> IS_DISPLAY	_T(<SPAN class=code-string>"</SPAN><SPAN class=code-string>DisplayName"</SPAN>)<BR>

variable
?!

#define	IS_KEY_LEN	256
#define IS_DISPLAY	_T("DisplayName")
#define	IS_KEY		_T("Software\\Microsoft\\Windows\\CurrentVersion\\Uninstall")

void CTestRegView::OnHelpReadodbc() 
{
	// TODO: Add your command handler code here

	HKEY hKey = NULL;
	DWORD dwIndex = 0;
	LONG lRet;
	DWORD cbName = IS_KEY_LEN;
	TCHAR szSubKeyName[IS_KEY_LEN];

	if (::RegOpenKeyEx(HKEY_LOCAL_MACHINE, IS_KEY, 0, KEY_READ, &hKey) != ERROR_SUCCESS)return;

	while((lRet = ::RegEnumKeyEx(hKey, dwIndex, szSubKeyName, &cbName, NULL, NULL, NULL, NULL)) != ERROR_NO_MORE_ITEMS)
	{
		if(lRet == ERROR_SUCCESS)
		{
			HKEY hItem;
			if (::RegOpenKeyEx(hKey, szSubKeyName, 0, KEY_READ, &hItem) != ERROR_SUCCESS)continue;
			TCHAR szDisplayName[IS_KEY_LEN];
			DWORD dwSize = sizeof(szDisplayName);
			DWORD dwType;
			if(::RegQueryValueEx(hItem, IS_DISPLAY, NULL, &dwType, (LPBYTE)&szDisplayName, &dwSize) == ERROR_SUCCESS)
			{
				TRACE("\n %s \n",szDisplayName);
			}
			::RegCloseKey(hItem);
		}
		dwIndex++;
		cbName = IS_KEY_LEN;
	}
	::RegCloseKey(hKey);
}

#define	IS_KEY		_T("SOFTWARE\\ODBC\\ODBCINST.INI")

// globals.h
#ifndef GLOBALS_H
#define GLOBALS_H

#ifdef GLOBALS_C
#  define MYGLOBAL_API
#else
#  define MYGLOBAL_API extern
#endif

MYGLOBAL_API int someMap[MAPSIZE_X][MAPSIZE_Y];

#undef MYGLOBAL_API // clean up - we won't need that symbol outside this header
#endif

// globals.c
#define GLOBALS_C // MYGLOBAL_API will be resolved to empty string
#include "globals.h" // defines the globals

// every_other_soucre_file.c
#include "globals.h" // declares the globals, but doesn't define them
//...

#define new DEBUG_NEW
int main()
{
  DWORD *pDW = new DWORD; //Line number 9
  return 0;
}

Detected memory leaks!
Dumping objects ->
{317} normal block at 0x002CFC40, 4 bytes long.
 Data: <    > CD CD CD CD 
Object dump complete.

Detected memory leaks!
Dumping objects ->
c:\users\rajesh r subramanian\documents\visual studio 2008\projects\test3\test3\test3dlg.cpp(9) : {317} normal block at 0x002DFC40, 4 bytes long. //See, the line numbers are mentioned
 Data: <    > CD CD CD CD 
Object dump complete.

typedef struct _S
{
	int a;
	std::string str;
}
S;

int main( void)
{
	std::vector<S> Vec;
	S s;
	s.a = 1; s.str = "hi";
	Vec.push_back(s);
	s.a = 2; s.str = "lol";
	Vec.push_back(s);
	s.a = 3; s.str = "nothing";
	Vec.push_back(s);

	std::vector<S>::iterator it;
	for(it = Vec.begin(); it != Vec.end(); it++)
	{
		cout << it->a << " : " << it->str.c_str() << endl;
	}

	for(unsigned int i = 0; i < Vec.size(); i++)
	{
		Vec[i].str = "BOOM!";
	}

	for(it = Vec.begin(); it != Vec.end(); it++)
	{
		cout << it->a << " : " << it->str.c_str() << endl;
	}
}

std::vector<S>::iterator it;
for(it = Vec.begin(); it != Vec.end(); it++)
{
	cout << "Before: "<< it->a << " : " << it->str.c_str() << endl;
	it->str = "New string value";
	cout << "After: "<< it->a << " : " << it->str.c_str() << endl;
}