C++ - CreateRemoteThread DLL Injection [Windows 7]

Question

Wherever I look the method of injecting through CreateRemoteThread is the same, however the method of grabbing the process ID is not... My function will return the correct process ID, and I am not interested in any help on that, so I will void that portion out and only include the actual injection.

I am only just learning DLL injection and am attempting to on notepad.exe. If the injection works, the title of a notepad will change from "Untitled - Notepad" to "Hooked".

#define DLL_NAME "injectme.dll"

.....

BOOL InjectRemoteThread(DWORD ProcessID)
{
    HANDLE RemoteProc;
    char buf[50]        =   {0};
    LPVOID MemAlloc;
    LPVOID LoadLibAddress;

    // Process ID does show correctly!
    WCHAR id[100];
    StringCbPrintf(id, 100, L"%d", ProcessID); // id contains the process ID... is confirmed in comparing ID shown in tasklist and the messagebox.
    MessageBox(NULL, id, L"Process ID", MB_ICONINFORMATION);
    // Process ID does show correctly!

    if ( !ProcessID )
    {
        MessageBox(NULL, (LPCWSTR)GetLastError(), L"An error occured", NULL);
        return 0;
    }
    RemoteProc          =   OpenProcess(PROCESS_VM_OPERATION | PROCESS_VM_WRITE | PROCESS_CREATE_THREAD | PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, ProcessID);
    if ( !RemoteProc )
    {
        MessageBox(NULL, (LPCWSTR)GetLastError(), L"An error occured", NULL);
        return 0;
    }
    LoadLibAddress      =   (LPVOID)GetProcAddress(GetModuleHandleA("kernel32.dll"), "LoadLibraryA");
    MemAlloc            =   (LPVOID)VirtualAllocEx(RemoteProc, NULL, strlen(DLL_NAME)+1, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
    WriteProcessMemory(RemoteProc, (LPVOID)MemAlloc, DLL_NAME, strlen(DLL_NAME)+1, NULL);
    CreateRemoteThread(RemoteProc, NULL, NULL, (LPTHREAD_START_ROUTINE)LoadLibAddress, (LPVOID)MemAlloc, NULL, NULL);

    CloseHandle(RemoteProc);
    VirtualFreeEx(RemoteProc, (LPVOID)MemAlloc, 0, MEM_RELEASE | MEM_DECOMMIT);
    return 1;
}

The DLL works on using another person's injector, but I don't understand why... It is indeed in the same directory as the injector.

Answer 1

I found the problem... I feel so stupid. Anyone with a similar problem: Instead of a relative path, use an absolute path.

I changed

#define DLL_NAME "injectme.dll"

To

#define DLL_NAME "C:\\Users\\Raikazu\\Documents\\Visual Studio 2012\\Projects\\Hooking\\Release\\injectme.dll"