Thread: Reading Registry Values

hi All,

I have a function that reads string values from the registry:

Code:

char *readregistry(char keyname[50], char keyvalue[20])
{
	BOOL ret, success;
	HKEY keyhandle;
	DWORD dwBufLen = 32;
	char myregval[100];
	char *str= (char *)malloc(100);

	if (str == NULL)
	{	cout << "Error allocating memory";
		exit(1);
	}

	ret=RegOpenKeyEx(HKEY_LOCAL_MACHINE,keyname,0,KEY_READ,&keyhandle);

	if (ret != ERROR_SUCCESS)
	{	
		strcpy(str, "NONE");
		return str;
	}
	else
	{
		success= RegQueryValueEx(keyhandle, keyvalue, NULL, NULL, (LPBYTE)myregval, &dwBufLen);
		if (success != ERROR_SUCCESS) {
			strcpy(str, "NONE");
			return str;
		}
		else
		{	strcpy(str, myregval);
			return str;
		}
	}

}

This normally works fine however if I am trying to read a unc network path from the registry some times it fails and returns 'NONE'.

For instance it cannot read this value:

\\computername\share\directory\subdirectory\

But it can read this:

\\computername\share\directory\

Any thoughts as to how to get around this problem?

Thanks in advance..
Aaron

You are passing a buffer size of 32. The string is more than 32 characters. You will get an error, ERROR_MORE_DATA.

Thank you anonytmouse.. That did it.. I upped the buffer to 255 and it works fine now.

Thanks again