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May 15th, 2007, 05:54 PM
#9
Re: Is it possible to find out what programs are installed in the start menu?
Thanks a ton eero_p I think you may have found exactly what I was needing!!
I've never worked with the registery but I am looking at the location you said:
\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
and I see Display Name is exactly what I need to copy to a text file 
When I click the Uninstall folder It shows the following:
Name: Default
Type: REG_SZ
Data: Value not Set
but all the folders under the Uninstall folder have more data such as:
Display Name: HP Photosmart
Type: REG_SZ
Data: HP Photosmart
I found this example that emerates the subkeys but i'm not sure if its what i'm looking for:
http://msdn2.microsoft.com/en-us/library/ms724256.aspx
Code:
// QueryKey - Enumerates the subkeys of key and its associated values.
// hKey - Key whose subkeys and values are to be enumerated.
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#define MAX_KEY_LENGTH 255
#define MAX_VALUE_NAME 16383
void QueryKey(HKEY hKey)
{
TCHAR achKey[MAX_KEY_LENGTH]; // buffer for subkey name
DWORD cbName; // size of name string
TCHAR achClass[MAX_PATH] = TEXT(""); // buffer for class name
DWORD cchClassName = MAX_PATH; // size of class string
DWORD cSubKeys=0; // 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, retCode;
TCHAR achValue[MAX_VALUE_NAME];
DWORD cchValue = MAX_VALUE_NAME;
// Get the class name and the value count.
retCode = RegQueryInfoKey(
hKey, // key handle
achClass, // buffer for class name
&cchClassName, // size 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 subkeys, until RegEnumKeyEx fails.
if (cSubKeys)
{
printf( "\nNumber of subkeys: %d\n", cSubKeys);
for (i=0; i<cSubKeys; i++)
{
cbName = MAX_KEY_LENGTH;
retCode = RegEnumKeyEx(hKey, i,
achKey,
&cbName,
NULL,
NULL,
NULL,
&ftLastWriteTime);
if (retCode == ERROR_SUCCESS)
{
_tprintf(TEXT("(%d) %s\n"), i+1, achKey);
}
}
}
// Enumerate the key values.
if (cValues)
{
printf( "\nNumber of values: %d\n", cValues);
for (i=0, retCode=ERROR_SUCCESS; i<cValues; i++)
{
cchValue = MAX_VALUE_NAME;
achValue[0] = '\0';
retCode = RegEnumValue(hKey, i,
achValue,
&cchValue,
NULL,
NULL,
NULL,
NULL);
if (retCode == ERROR_SUCCESS )
{
_tprintf(TEXT("(%d) %s\n"), i+1, achValue);
}
}
}
}
void _tmain(void)
{
HKEY hTestKey;
if( RegOpenKeyEx( HKEY_CURRENT_USER,
TEXT("SOFTWARE\\Microsoft"),
0,
KEY_READ,
&hTestKey) == ERROR_SUCCESS
)
{
QueryKey(hTestKey);
}
}
When they say "KEY"
Do they refer to that long string of characters and numbers as the folder name when you look in regedit?
like:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{00010409-78E1-11D2-B60F-006097C998E7}
and the { .... } is the key?
So really I should be looking for functions that can read all the "KEYS" under the directory:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\
and access the KEYS DisplayName if a KEy has it, copy the DisplayName's value to a file;
if the key doesn't have a DisplayName value, skip that key?
Anyone know of any functions for accessing's a key's data if thats what its called?
I think this will direct me to the right directory but i'm not sure
how to go about reading the key's once I get to the directory because I don't know what the key value will be.
Code:
void _tmain(void)
{
HKEY hTestKey;
if( RegOpenKeyEx( HKEY_CURRENT_USER,
TEXT("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\"),
0,
KEY_READ,
&hTestKey) == ERROR_SUCCESS
)
{
QueryKey(hTestKey);
}
}
Last edited by voidflux; May 15th, 2007 at 06:06 PM.
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