Programming Forums > Application Development > C++

KuraKai · Mar 1st, 2008, 8:22 PM

Ok, I am a little lost on this one now. I never liked MSDN...so for example lets say we have two values. One is named hexData and then the other is stringData, and we want to read them into hexBuff and the other one into stringBuff. How would i put that into this. It would use MyKey and then the first one will be 0 and the second one will be 1 for the next value. And after that I get lost to how they want to go about doing the rest, any help Ancient Dragon? Also thank you alot for the help so far, and sorry for the slowness on this.

Ancient Dragon · Mar 1st, 2008, 9:41 PM

I have deleted the test data in my registry but I think this will work

(Toggle Plain Text)

int main(int argc, char *argv[])
{
    HKEY MyKey = 0;
    
    BYTE szBuff[255] = {0};
    char szStringBuff[255] = {0};
    char szValueName[255] = {0};
    DWORD cb = 0;
    DWORD dwType = REG_SZ;
    LONG rval;
    if (RegOpenKey(HKEY_CURRENT_USER, "Software\\Random\\Program", &MyKey) == ERROR_SUCCESS)
    {
       cout << "Program is installed\n";
       cb = sizeof(szBuff);
       
       //Debug info, this normally isn't here!
       DWORD index = 0;
       DWORD dwValueNameSize = sizeof(szValueName);
        rval = RegEnumValue(MyKey, index, szValueName, &dwValueNameSize, 0, &dwType, szBuff, &cb);
        while(rval == ERROR_SUCCESS)
        {
            cout << szValueName << ": " << szBuff << "\n";
            // sqValueName is the name of the key
            if( stricmp(szValueName,"hexBuff") == 0)
                strcpy((char *)szBuff, szValueName);
            else if( stricmp(szValueName, "stringBuff") == 0)
                strcpy(szStringBuff, szValueName);
            // increment index counter to get next key
            index++;
            dwValueNameSize = sizeof(szValueName);
            rval = RegEnumValue(MyKey, index, szValueName, &dwValueNameSize, 0, &dwType, szBuff, &cb);
       }
       printf("%d",rval);
       cout << '\n';

       RegCloseKey(MyKey);
    }

    system("PAUSE");
    return EXIT_SUCCESS;
}

KuraKai · Mar 1st, 2008, 10:40 PM

Ok I cleaned up the code a bit, this is only to list every values in the key.

 C++ Syntax (Toggle Plain Text) 
#include <cstdlib>
#include <iostream>
#include "windows.h"
#include "winnt.h"
#include "winreg.h"
 
 
using namespace std;
 
int main(int argc, char *argv[])
{
    HKEY myKey = 0;
 
    char szValueBuff[255] = {0};
    char szValueName[255] = {0};
 
    DWORD dwType = REG_SZ;
 
    if(RegOpenKey(HKEY_CURRENT_USER, "Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon", &myKey) == ERROR_SUCCESS)
    {
       cout << "Windows is installed!(Duh!)\n";
 
       DWORD index = 0;
       DWORD dwValueNameSize = sizeof(szValueName);
       DWORD dwValueBuffSize = sizeof(szValueBuff);
       while(RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0,
       &dwType, (byte *)szValueBuff, &dwValueBuffSize) == ERROR_SUCCESS)
	   {
			 cout << szValueName << " : " << szValueBuff << "\n";
			 index++;
	   }
 
       cout << "Error - ";
	   cout << RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0,
	   &dwType, (byte *)szValueBuff, &dwValueBuffSize);
	   cout << '\n';
 
       RegCloseKey(myKey);
    }
 
    system("PAUSE");
    return EXIT_SUCCESS;
}
#include <cstdlib>
#include <iostream>
#include "windows.h"
#include "winnt.h"
#include "winreg.h"


using namespace std;

int main(int argc, char *argv[])
{
    HKEY myKey = 0;
    
    char szValueBuff[255] = {0};
    char szValueName[255] = {0};
    
    DWORD dwType = REG_SZ;

    if(RegOpenKey(HKEY_CURRENT_USER, "Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon", &myKey) == ERROR_SUCCESS)
    {
       cout << "Windows is installed!(Duh!)\n";
       
       DWORD index = 0;
       DWORD dwValueNameSize = sizeof(szValueName);
       DWORD dwValueBuffSize = sizeof(szValueBuff);
       while(RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0,
       &dwType, (byte *)szValueBuff, &dwValueBuffSize) == ERROR_SUCCESS)
	   {
			 cout << szValueName << " : " << szValueBuff << "\n";
			 index++;
	   }
       
       cout << "Error - ";
	   cout << RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0,
	   &dwType, (byte *)szValueBuff, &dwValueBuffSize);
	   cout << '\n';
	   
       RegCloseKey(myKey);
    }
    
    system("PAUSE");
    return EXIT_SUCCESS;
}

This for me returns...

(Toggle Plain Text)

Windows is installed!(Duh!)
ParseAutoexec : 1
Error - 234
Press any key to continue . . .

But there are other values there that aren't being found. Also the constant resizing of the buffsizes value is pointless being that they never change through out this.

Ancient Dragon · Mar 1st, 2008, 11:36 PM

>>Also the constant resizing of the buffsizes value is pointless being that they never change through out this
That's needed because RegEnumValue() changes the variable to the actual length of the text inserted into the destination buffer (the string may or may not be null-terminated). So you have to change it back to the original value before calling RegEnumValue() again.

Quote:

lpcbData
A pointer to a variable that specifies the size of the buffer pointed to by the lpData parameter, in bytes. When the function returns, this variable contains the size of the data copied to lpData.

KuraKai · Mar 2nd, 2008, 12:12 AM

Alrighty then, at first adding that first resize doesn't make it work. However there was a secondary one that was needed.

 c++ Syntax (Toggle Plain Text) 
       while(RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0,
       &dwType, (byte *)szValueBuff, &dwValueBuffSize) == ERROR_SUCCESS)
	   {
			 cout << szValueName << " : " << szValueBuff << "\n";
			 index++;
             dwValueNameSize = sizeof(szValueName);
             dwValueBuffSize = sizeof(szValueBuff);
	   }
       while(RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0,
       &dwType, (byte *)szValueBuff, &dwValueBuffSize) == ERROR_SUCCESS)
	   {
			 cout << szValueName << " : " << szValueBuff << "\n";
			 index++;
             dwValueNameSize = sizeof(szValueName);
             dwValueBuffSize = sizeof(szValueBuff);
	   }

That one makes it work, I guess I saw the first one as pointless cause with or without it there was no further progress. But now that you mentioned that i guess the other one had to be resized also. That lists all of them with it.

Mar 1st, 2008, 8:22 PM	#11
KuraKai Newbie Join Date: Mar 2008 Posts: 25 Rep Power: 0	Re: RegQueryValue Issues Ok, I am a little lost on this one now. I never liked MSDN...so for example lets say we have two values. One is named hexData and then the other is stringData, and we want to read them into hexBuff and the other one into stringBuff. How would i put that into this. It would use MyKey and then the first one will be 0 and the second one will be 1 for the next value. And after that I get lost to how they want to go about doing the rest, any help Ancient Dragon? Also thank you alot for the help so far, and sorry for the slowness on this.

Mar 1st, 2008, 9:41 PM	#12
Ancient Dragon PFO God In Training Join Date: Jun 2005 Location: near St Louis, MO. (USA) Posts: 598 Rep Power: 4	Re: RegQueryValue Issues I have deleted the test data in my registry but I think this will work (Toggle Plain Text) int main(int argc, char argv[]) { HKEY MyKey = 0; BYTE szBuff[255] = {0}; char szStringBuff[255] = {0}; char szValueName[255] = {0}; DWORD cb = 0; DWORD dwType = REG_SZ; LONG rval; if (RegOpenKey(HKEY_CURRENT_USER, "Software\\Random\\Program", &MyKey) == ERROR_SUCCESS) { cout << "Program is installed\n"; cb = sizeof(szBuff); //Debug info, this normally isn't here! DWORD index = 0; DWORD dwValueNameSize = sizeof(szValueName); rval = RegEnumValue(MyKey, index, szValueName, &dwValueNameSize, 0, &dwType, szBuff, &cb); while(rval == ERROR_SUCCESS) { cout << szValueName << ": " << szBuff << "\n"; // sqValueName is the name of the key if( stricmp(szValueName,"hexBuff") == 0) strcpy((char )szBuff, szValueName); else if( stricmp(szValueName, "stringBuff") == 0) strcpy(szStringBuff, szValueName); // increment index counter to get next key index++; dwValueNameSize = sizeof(szValueName); rval = RegEnumValue(MyKey, index, szValueName, &dwValueNameSize, 0, &dwType, szBuff, &cb); } printf("%d",rval); cout << '\n'; RegCloseKey(MyKey); } system("PAUSE"); return EXIT_SUCCESS; } int main(int argc, char argv[]) { HKEY MyKey = 0; BYTE szBuff[255] = {0}; char szStringBuff[255] = {0}; char szValueName[255] = {0}; DWORD cb = 0; DWORD dwType = REG_SZ; LONG rval; if (RegOpenKey(HKEY_CURRENT_USER, "Software\\Random\\Program", &MyKey) == ERROR_SUCCESS) { cout << "Program is installed\n"; cb = sizeof(szBuff); //Debug info, this normally isn't here! DWORD index = 0; DWORD dwValueNameSize = sizeof(szValueName); rval = RegEnumValue(MyKey, index, szValueName, &dwValueNameSize, 0, &dwType, szBuff, &cb); while(rval == ERROR_SUCCESS) { cout << szValueName << ": " << szBuff << "\n"; // sqValueName is the name of the key if( stricmp(szValueName,"hexBuff") == 0) strcpy((char )szBuff, szValueName); else if( stricmp(szValueName, "stringBuff") == 0) strcpy(szStringBuff, szValueName); // increment index counter to get next key index++; dwValueNameSize = sizeof(szValueName); rval = RegEnumValue(MyKey, index, szValueName, &dwValueNameSize, 0, &dwType, szBuff, &cb); } printf("%d",rval); cout << '\n'; RegCloseKey(MyKey); } system("PAUSE"); return EXIT_SUCCESS; } __________________ <<Freelance Programmer>> << Hobby Site>>

Mar 1st, 2008, 10:40 PM	#13
KuraKai Newbie Join Date: Mar 2008 Posts: 25 Rep Power: 0	Re: RegQueryValue Issues Ok I cleaned up the code a bit, this is only to list every values in the key. C++ Syntax (Toggle Plain Text) #include <cstdlib> #include <iostream> #include "windows.h" #include "winnt.h" #include "winreg.h" using namespace std; int main(int argc, char argv[]) { HKEY myKey = 0; char szValueBuff[255] = {0}; char szValueName[255] = {0}; DWORD dwType = REG_SZ; if(RegOpenKey(HKEY_CURRENT_USER, "Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon", &myKey) == ERROR_SUCCESS) { cout << "Windows is installed!(Duh!)\n"; DWORD index = 0; DWORD dwValueNameSize = sizeof(szValueName); DWORD dwValueBuffSize = sizeof(szValueBuff); while(RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0, &dwType, (byte )szValueBuff, &dwValueBuffSize) == ERROR_SUCCESS) { cout << szValueName << " : " << szValueBuff << "\n"; index++; } cout << "Error - "; cout << RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0, &dwType, (byte )szValueBuff, &dwValueBuffSize); cout << '\n'; RegCloseKey(myKey); } system("PAUSE"); return EXIT_SUCCESS; } #include <cstdlib> #include <iostream> #include "windows.h" #include "winnt.h" #include "winreg.h" using namespace std; int main(int argc, char argv[]) { HKEY myKey = 0; char szValueBuff[255] = {0}; char szValueName[255] = {0}; DWORD dwType = REG_SZ; if(RegOpenKey(HKEY_CURRENT_USER, "Software\\Microsoft\\Windows NT\\CurrentVersion\\Winlogon", &myKey) == ERROR_SUCCESS) { cout << "Windows is installed!(Duh!)\n"; DWORD index = 0; DWORD dwValueNameSize = sizeof(szValueName); DWORD dwValueBuffSize = sizeof(szValueBuff); while(RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0, &dwType, (byte )szValueBuff, &dwValueBuffSize) == ERROR_SUCCESS) { cout << szValueName << " : " << szValueBuff << "\n"; index++; } cout << "Error - "; cout << RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0, &dwType, (byte )szValueBuff, &dwValueBuffSize); cout << '\n'; RegCloseKey(myKey); } system("PAUSE"); return EXIT_SUCCESS; } This for me returns... (Toggle Plain Text) Windows is installed!(Duh!) ParseAutoexec : 1 Error - 234 Press any key to continue . . . Windows is installed!(Duh!) ParseAutoexec : 1 Error - 234 Press any key to continue . . . But there are other values there that aren't being found. Also the constant resizing of the buffsizes value is pointless being that they never change through out this.

Mar 2nd, 2008, 12:12 AM	#15
KuraKai Newbie Join Date: Mar 2008 Posts: 25 Rep Power: 0	Re: RegQueryValue Issues Alrighty then, at first adding that first resize doesn't make it work. However there was a secondary one that was needed. c++ Syntax (Toggle Plain Text) while(RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0, &dwType, (byte )szValueBuff, &dwValueBuffSize) == ERROR_SUCCESS) { cout << szValueName << " : " << szValueBuff << "\n"; index++; dwValueNameSize = sizeof(szValueName); dwValueBuffSize = sizeof(szValueBuff); } while(RegEnumValue(myKey, index, szValueName, &dwValueNameSize, 0, &dwType, (byte )szValueBuff, &dwValueBuffSize) == ERROR_SUCCESS) { cout << szValueName << " : " << szValueBuff << "\n"; index++; dwValueNameSize = sizeof(szValueName); dwValueBuffSize = sizeof(szValueBuff); } That one makes it work, I guess I saw the first one as pointless cause with or without it there was no further progress. But now that you mentioned that i guess the other one had to be resized also. That lists all of them with it.

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Programming Forums > Application Development > C++

RegQueryValue Issues