Check if reg key exists to see if dotnet is installed (C/C++)

ExistenceRegKey.cpp

#include <windows.h>
#include <stdio.h>
#include <iostream>
 
using namespace std;
 
int main()
{
	//set up our variables and buffers.
	DWORD dwType = 0;
	wchar_t szVersion[1024] = {0};
	DWORD dwDataSize = 1024;
	HKEY hkeyDotNetVer = NULL;
	long lResult = 0;
 
	// open the key for reading.
	lResult = RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\NET Framework Setup\\NDP\\v2.0.50727", 0, KEY_READ, &hkeyDotNetVer);
	if(ERROR_SUCCESS == lResult)
	{
		// read the version value
		lResult = RegQueryValueEx(hkeyDotNetVer, L"Version", NULL, &dwType, (BYTE*)szVersion, &dwDataSize);
		if(ERROR_SUCCESS == lResult)
		{
			//memcpy(szVersion, lpByteData, dwDataSize);
			std::wcout << "Dot net Version = " << szVersion << std::endl;
			return 0;
		}
		else
		{
			std::wcout<<"unable to read registry Error Code : "<<GetLastError();
			return -1;
		}
	}
	else
	{
		std::wcout<<"unable to read registry Error Code : "<<GetLastError();
		return -1;
	}
}