#include <windows.h>
#include <iostream.h>

int main(void)
{
  HKEY hKey;
  DWORD Value = 0;

  // Try to read
  if(RegOpenKey(HKEY_CURRENT_USER, "Software\\MyCompany\\MyApp", &hKey) == ERROR_SUCCESS)
  {
    DWORD Type = REG_DWORD, Size = sizeof(DWORD);
    RegQueryValueEx(hKey, "Value", 0, &Type, (BYTE *)&Value, &Size);
    cout << "Got Value: " << Value << endl;
  }
  else
    cout << "Failed to read value" << endl;
  RegCloseKey(hKey);

  // Try to save the Value
  if(RegCreateKeyEx(HKEY_CURRENT_USER, "Software\\MyCompany\\MyApp", 0, 0, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, 0, &hKey, 0) == ERROR_SUCCESS)
  {
    Value++;
    RegSetValueEx(hKey, "Value", 0, REG_DWORD, (BYTE *)&Value, sizeof(Value));
    cout << "Did write value" << endl;
  }
  else
    cout << "Failed to write value" << endl;
  RegCloseKey(hKey);

  return 0;
}