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Reading value from a key in Windows Registry (VC++ code)

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2.33/5 (3 votes)
22 Nov 2011CPOL 31.3K   3   5
How to read a value from a key in the Windows Registry.
C++
wchar_t buffer[MAX_PATH];
wchar_t* szValueName;
wchar_t* SubKeyName;
wchar_t* installPath;
HKEY hKey;
DWORD dwBufLen;
LONG lret;

HRESULT hr = E_FAIL;
DWORD* reservedNULL = NULL;
DWORD reservedZero = 0;

szValueName = L"Path";
SubKeyName = L"SOFTWARE\\7-Zip";
lret = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
          SubKeyName,
          reservedZero,
          KEY_READ,
          &hKey);
if (lret == ERROR_SUCCESS)
{
    dwBufLen = MAX_PATH;
    lret = RegQueryValueEx(hKey,
              szValueName,
              reservedNULL,
              NULL,
              (BYTE*)buffer,
              &dwBufLen);
    if (lret == ERROR_SUCCESS)
    {
       installPath = buffer;
       hr = S_OK;
    } // end if successfull value read
    RegCloseKey(hKey);
} // end if successfule key open

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Architect
India India
My name is Mitendra Anand and my work is focused around application development which includes a lot of prototyping of new solutions.

While I have a background in C++/VC++ programming, my daily work is mostly spent in C++, Sybase, SQL, Unix/Windows.

Comments and Discussions

 
GeneralMy vote of 1 Pin
luckyrockstar50510-Jul-14 10:53
luckyrockstar50510-Jul-14 10:53 
GeneralThe method of defining a union RegKeyValue just to get somet... Pin
nv322-Nov-11 5:46
nv322-Nov-11 5:46 
GeneralRe: Thanks for correcting it. Your code certainly is more neat. ... Pin
Mitendra Anand22-Nov-11 6:26
Mitendra Anand22-Nov-11 6:26 
GeneralReason for my vote of 1 Trivial Pin
Member 351467110-Nov-11 5:04
Member 351467110-Nov-11 5:04 
Reason for my vote of 1
Trivial
GeneralRe: Can you provide me a better way to read the reg value from C... Pin
Mitendra Anand10-Nov-11 5:08
Mitendra Anand10-Nov-11 5:08 

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