Trying to write to a .exe

[garrows]

I am trying to write to a exe and have the program verify as it goes but I keep getting the find window error even if the name is correct

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

using namespace std;

int main()
{
char continue1;
int newValue = 1200;
int readTest = 0;
string MyString;
string address;
cout << "What is the game name?(THE THING IN THE WHITE BAR)" <<endl;
cin >> MyString;
Sleep(2000);
if(continue1 == 'Y')
{
HWND hwnd = FindWindowA(NULL, MyString.c_str());
if(hwnd == NULL)
    {
        cout << "Cannot find window." <<endl;
        Sleep(3000);
        exit(-1);
    }
    else
    {
        cout << "Connected" <<endl;
        Sleep(2000);
            DWORD procID;
            GetWindowThreadProcessId(hwnd, &procID);
            HANDLE handle = OpenProcess(PROCESS_ALL_ACCESS, FALSE, procID);

            if(procID == NULL)
    {
        cout << "Cannot obtain process." <<endl;
        Sleep(3000);
        exit(-1);
    }
    else
    {
        cout << "Put in the address you want to edit." <<endl;
        cin >> address;
        WriteProcessMemory(handle, (LPVOID)address.c_str(), &newValue, sizeof(newValue), 0);
        ReadProcessMemory(handle, (PBYTE*)address.c_str(), &readTest, sizeof(int), 0);
        cout << readTest <<endl;
        Sleep(3000);

    }

}
}
if(continue1 == 'N')
{
    cout << "Goodbye." <<endl;
    Sleep(2000);
    exit(-1);
}
    return 0;
}

[JLBorges]

> I keep getting the find window error even if the name is correct

The window that you are trying to find may not be a top-level window (a window with the desktop as the parent).

Try to find the window with FindWindowEx
https://msdn.microsoft.com/en-us/library/windows/desktop/ms633500(v=vs.85).aspx

const auto hwnd = FindWindowExA( nullptr, nullptr, nullptr, MyString.c_str() ) ;