Can read REG_SZ but not REG_DWORD value

[MasterDucky]

Hi,

I can read REG_SZ values but not REG_DWORD values from the registry.

Do I need another type than char* as 5th parameter of the RegQueryValueEx() function if I want to read REG_DWORD value
or something else is the problem?

#include <windows.h>
#include <winreg.h>
#include <iostream>
using namespace std;

int main()
{
    HKEY hKey;
    char Data[255];
    DWORD Datasize = sizeof(Data);
    DWORD Type;

    if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,
                    "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion",
                    0,
                    KEY_QUERY_VALUE|KEY_WOW64_32KEY,
                    &hKey)== ERROR_SUCCESS)

    {
        DWORD error = RegQueryValueEx(hKey,
                        "InstallDate",
                        NULL,
                        &Type,
                        (LPBYTE)&Data,
                        &Datasize);

        if(error == ERROR_SUCCESS)
        {
            cout << " Data = " << Data <<
                 "\n Size = " << Datasize <<
                 "\n Type = " << Type <<endl;
        
        }
        else
        {
           cout << "RegQueryValueEx error " << error << endl;
        }

    }
    else cout << "RegopenkeyEx error " << error << endl;

    RegCloseKey(hKey);

    return 0;
}

[2kaud]

Have a look at
https://social.msdn.microsoft.com/Fo...orum=vcgeneral

[MasterDucky]

Thank you Kaud!

I managed to read other REG_DWORD values by modifying the code with the help of your link but this specific key returns me 0.

Edit: but on another machine its working so it must be something else than the code.

[Arjay]

Check out the CRegKey class in msdn - all that registry stuff is done for you.

[MasterDucky]

Great, thanks!