MS problem...

main.cc

#include <string>
#include <windows.h>
#pragma comment(lib, "Advapi32.lib")

std::string getOSInfo()
{
  std::string value;
	HKEY result;
	BYTE data[MAX_PATH] = {0};
	DWORD length = MAX_PATH;
	DWORD type = 0;
	LONG ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, 
		"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\", 
		0, 
		KEY_QUERY_VALUE , 
		&result);
	if (ERROR_SUCCESS == ret) {
		//scope_exit RegCloseKey(result);
		ret = RegQueryValueEx(result, "ProductName", 0, &type, data, &length);
		if (ERROR_SUCCESS == ret) {
			value = (char*)data;
			ZeroMemory(data, MAX_PATH);
			length = MAX_PATH;
			type = 0;
			//下面这句 死活返回2。。。肿么办。。。
			ret = RegQueryValueEx(result, "CSDVersion", 0, &type, data, &length);
			if (ERROR_SUCCESS == ret) {
				return value + " " + (char*)data;
			}
		}
	}
	return "";
}

int main()
{
	printf("OS Information:%s", getOSInfo().c_str());
	return 0;
}