getting a handle to a process that is not your own

#include "stdafx.h"
#include "windows.h"
#include <iostream>
using namespace std;
 
int main()
{
	HANDLE MyWnd;
	MyWnd = FindWindow(NULL, "MyWindow");
	if(MyWnd){ 
		cout << "I found the window!\n";
	}
	else{
		cout << "I did not find the window\n";
	}
 
	DWORD lpNumRead;
DWORD writeNumRead;
char stmBUF[200];	
HANDLE openfile;
ReadProcessMemory(MyWnd, (void*)0x11E79F00, stmBUF, 200, &lpNumRead);
cout << stmBUF;
openfile = CreateFile("c:\\DroppedMem.txt", OF_READWRITE, NULL, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_HIDDEN, NULL);
WriteFile(openfile, stmBUF, 200, &writeNumRead, NULL);
CloseHandle(openfile);
CloseHandle(MyWnd);
return 0;
}