C++ How to get process ID from filename of DLL(windows)?

how can I get a process ID from a filename? Like: int processId = getProcessIdByFileName("Network.dll"); Btw, which datatype has the process ID?

Extended info: I have the source code of a DLL. This DLL gets 开发者_如何学Pythonloaded to an application, like a few other DLL's. I want to hook the other DLL's functions. Therefore I need the process ID of them(is there a process ID for each DLL if they all run under one application?

How could I call functions of the other DLL's inside of my DLL? How to get a handle to them?

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DLLs do not have process IDs. A DLL may be loaded into multiple processes, or none at all. A DLL may be loaded into a process, later unloaded, and then loaded again. It is meaningless to talk of the process ID of a DLL. What are you actually trying to do?

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This isn't possible, and here's why. DLLs are shared between processes. It may only have one "owning" process, it may have many. You CAN determine which dlls a program has loaded (e.g. dependency walker) however you can't determine which programs (if any) are attached to a DLL.

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Process ID in Windows is not staticaly embedded inside file, its a property that any DLL, EXE or executable has once its running. Check Toolhelp API, you`ll find all answers there.

To call functions from other DLL you need to load that DLL dynamicaly, check here for an example http://www.codeproject.com/KB/DLL/dynamicdllloading.aspx

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DLLs are not run, they are loaded by processes so this is not possible. You can however look for the PID of a process by using its path or name ie. Get PID of "explorer.exe"

You could get the PID's of the processes that have loaded the specific DLL. ie.

int PIDs[128];
GetDependentProcesses(PIDs, "Kernel32.dll"); //Custom function, not built in

for(int x = 0; x < 128; x++)
{
   cout << PIDs[x] << " Depends on Kernel32.dll\n";
}

And you cant hook a DLL, only a process.