HKEY_LOCAL_MACHINESOFTWAREMozillaMozilla Firefox 3.0.10bin

HKEY_LOCAL_MACHINE

if(RegOpenKeyEx(HKEY_LOCAL_MACHINE,TEXT("\SOFTWARE"),0,KEY_QUERY_VALUE,&keyHandle) == ERROR_SUCCESS)

if(RegOpenKeyEx(HKEY_CLASSES_ROOT,TEXT("\Shell"),0,KEY_QUERY_VALUE,&keyHandle) == ERROR_SUCCESS)

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

int main() {
    HKEY hk;

    long n = RegOpenKeyEx(HKEY_LOCAL_MACHINE,TEXT("\SOFTWARE"),
                      0,KEY_QUERY_VALUE, &hk );
    if ( n == ERROR_SUCCESS ) {
    	cout << "OK" << endl;
    }
    else {
    	cout << "Failed with value " << n << endl;
    }
}