Re: How to read a value from registry?
1. I would use RegQueryValueEx instead of RegQueryValue.
2. "connectionType is a DWORD in the registery, so that means that you have
to pass a pointer to a DWORD instead of acBuffer as the buffer.
3. On the string ones, you might not have enough storage to get the entire
thing, so you might want to call RegQueryValueEx once without a buffer, and
it will return how much space it needs, then call it again with enough space
to catch the value.
But in your case it is just that your lSize is not reset to the buffer size
in between your calls to RegQueryValue.
Here is YOUR code modified to work (this does not mean that you don't have
to check the size of the string)
if (RegOpenKey(HKEY_CURRENT_USER, (LPCSTR)path, &hkFileEdit) ==
ERROR_SUCCESS)
{
char acBuffer[250];
DWORD lSize = 250L;
DWORD dwType;
DWORD DWBuffer;
lSize = sizeof(DWORD);
long Res = RegQueryValueEx(hkFileEdit, "ConnectionType",NULL,&dwType,
(LPBYTE)&DWBuffer,&lSize);
lSize = 250;
Res = RegQueryValueEx(hkFileEdit, "ProviderName", NULL,&dwType,
(LPBYTE)acBuffer,&lSize);
lSize = 250;
Res = RegQueryValueEx(hkFileEdit, "RemotePath", NULL,&dwType,
(LPBYTE)acBuffer,&lSize);
csRegPath = CString(acBuffer);
RegCloseKey(hkFileEdit);
}
AliR.
"DBC User" <dbcuser@gmail.com> wrote in message
news:1188416930.578782.255300@k79g2000hse.googlegroups.com...
I am trying to read some values from HKCU\Network\G, this has default
lot more information and one of them is actual network share of the
drive.I have the following code but it does not return the value for
the subkey, could you please tell me what am I doing wrong? I am using
VC++ 6.0
CString path = "Network\\"+ (CString)drive;
MsgBox( MBOX_INFO, "path = [%s] ", path);
if (RegOpenKey(HKEY_CURRENT_USER, (LPCSTR)path, &hkFileEdit) ==
ERROR_SUCCESS)
{
char acBuffer[250];
long lSize = 250L;
RegQueryValue(hkFileEdit, "ConnectionType", acBuffer,
&lSize);
MsgBox( MBOX_INFO, "local = [%s] CT = [%s] and length = [%d]",
local, (CString)acBuffer, lSize);
RegQueryValue(hkFileEdit, "ProviderName", acBuffer, &lSize);
MsgBox( MBOX_INFO, "local = [%s] PN = [%s] and length = [%d]",
local, (CString)acBuffer, lSize);
RegQueryValue(hkFileEdit, "RemotePath", acBuffer, &lSize);
csRegPath = CString(acBuffer);
RegCloseKey(hkFileEdit);
MsgBox( MBOX_INFO, "local = [%s] remote = [%s] and length = [%d]",
local, (CString)acBuffer, lSize);
}