Need help understanding this Code.

Sup Guys,
I just need help breaking down and help me understand this code.

Code:

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

char g_szWindowTitle[MAX_PATH];

BOOL CALLBACK EnumWindowsProc(HWND hWindow, LPARAM lParam)
{
	if(hWindow != NULL)
	{
		if(lParam != NULL)
		{
			char szLocalTitle[MAX_PATH];
			GetWindowTextA( hWindow, szLocalTitle, MAX_PATH );
			
			if(strstr(szLocalTitle, (const char*)lParam ) != NULL )
			{
				if(GetWindowLong(hWindow, GWL_STYLE) & WS_VISIBLE) 
				    ShowWindow( hWindow, SW_HIDE );

				else
					ShowWindow( hWindow, SW_SHOW );
			}
		}
	}

	return TRUE;
}


void Thread_Hide()
{
	while(1)
	{
		if(GetStdHandle( STD_INPUT_HANDLE ) != INVALID_HANDLE_VALUE )
		{
			printf("\n Enter window title to hide: ");
			fgets( g_szWindowTitle, MAX_PATH, stdin );
			g_szWindowTitle[ strlen( g_szWindowTitle ) - 1] = '\0';

			if(strstr(g_szWindowTitle, "current") != NULL) 
				GetWindowTextA(GetForegroundWindow(), g_szWindowTitle, MAX_PATH );

			else if(!stricmp(g_szWindowTitle, "quit"))
				ExitProcess( 0 );

			EnumWindows( (WNDENUMPROC)&EnumWindowsProc, (LPARAM)g_szWindowTitle );
		}
		Sleep(50);
	}
}

int main(int argc, char **argv)
{
	WaitForSingleObject( CreateThread( 0, 0, (LPTHREAD_START_ROUTINE)&Thread_Hide, 0, 0, 0), INFINITE);
	
	return 0;
}

What this program does: Hides the window without a trace and shows the window when the user feels like it.(To put it simply).
I made a similar program like this before but it had lots of bugs(like it's crazy).
I was able to make my program hide it but I couldn't bring it back.
If you can explain it to me, I would really appreciate it.

Thanks,
MassCoder(1st Post)

 

shitty window hider

 

is it a corrupt script by any chance?