Registry problem

[John_Reese]

Hello. I need some code that will allow me to access a known path through the registry and read an unknown value name and value, of which I know the index. In other words, I need to be able to read the default value in a folder to check for present software...The default is not always called "default", in German it's "Standard", in French, ??. Can anyone help me with this?

[G. Garman]

Here is some sample code which uses RegQueryInfoKey
and loops through the sub keys. You could look via a case statement for whatever values you want and do as you see fit.

void CCFISetupDlg::QueryKey(HANDLE hKey)
{

CHAR achKey[MAX_PATH];
CHAR achClass[MAX_PATH] = ""; // buffer for class name
DWORD cchClassName = MAX_PATH; // length of class string
DWORD cSubKeys; // number of subkeys
DWORD cbMaxSubKey; // longest subkey size
DWORD cchMaxClass; // longest class string
DWORD cValues; // number of values for key
DWORD cchMaxValue; // longest value name
DWORD cbMaxValueData; // longest value data
DWORD cbSecurityDescriptor; // size of security descriptor
FILETIME ftLastWriteTime; // last write time

DWORD i;
DWORD retCode;

DWORD cchValue = _MAX_FNAME;

// Get the class name and the value count.
RegQueryInfoKey((struct HKEY__ *)hKey, // key handle
achClass, // buffer for class name
&cchClassName, // length of class string
NULL, // reserved
&cSubKeys, // number of subkeys
&cbMaxSubKey, // longest subkey size
&cchMaxClass, // longest class string
&cValues, // number of values for this key
&cchMaxValue, // longest value name
&cbMaxValueData, // longest value data
&cbSecurityDescriptor, // security descriptor
&ftLastWriteTime); // last write time

// Enumerate the child keys, looping until RegEnumKey fails. Then
// get the name of each child key and copy it into the list box.
for (
i = 0, retCode = ERROR_SUCCESS;
retCode == ERROR_SUCCESS;
i++
)
{
retCode = RegEnumKey((struct HKEY__ *)hKey, i, achKey, MAX_PATH);
if (retCode == (DWORD)ERROR_SUCCESS)
{
//valid key
struct HKEY__ * hNextKey;
int RegOpenRet;

//search for our value
if (strcmp(achKey,"TEST") == 0 )
{
switch (1)
{
case 1:
RegOpenRet = RegOpenKeyEx( (struct HKEY__ *)hKey,"Microsoft",0,KEY_READ,&hNextKey);
if (RegOpenRet != (DWORD)ERROR_SUCCESS)
printf("help");
QueryKey(hNextKey);
}
}
}
}

}

[John_Reese]

Hey, thanks for the response...We actually figured out yesterday that if you pass a NULL as the value name, it returns the default value, which is what we need...I appreciate your help though...