How to find out to what process my dll is attached?

Question

Before my dll file gets injected to a process, I want to check if it actually is the process I want it to inject. Is there a way to achieve this, so I could abort the injection process if its the wrong process? Thank you in advance for any help!

int APIENTRY DllMain(HMODULE hModule, DWORD reason, LPVOID reserved)
{
    if (reason == DLL_PROCESS_ATTACH)
    {
        if (process == theprocessiwant)
        {
            //call my stuff....
        }
    }
        return true;
}

Answer 1

GetModuleFileNameA will give you the complete path of the executable of whose process you have injected into. Compare this path against your predefined executable path.

Answer 2

Okay thank you for your suggestions, I found a working way!

DWORD targetProcessId;
int APIENTRY DllMain(HMODULE hModule, DWORD reason, LPVOID reserved)
{
    PROCESSENTRY32 entry;
    entry.dwSize = sizeof(PROCESSENTRY32);

    HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);

    if (Process32First(snapshot, &entry) == TRUE)
    {
        while (Process32Next(snapshot, &entry) == TRUE)
        {
            if (_stricmp(entry.szExeFile, "target.exe") == 0)
            {
                targetProcessId = entry.th32ProcessID;
            }
        }
    }
    CloseHandle(snapshot);

    if (reason == DLL_PROCESS_ATTACH)
    {
        if (GetCurrentProcessId() == targetProcessId)
        {
           //MY Code
        }
    }

    return true;
}