Getting the executable-path from a window

Im trying to get the executable path from a program that is running. I can find the window handle with FindWindow, but now i dont know how to find the path from where the program is running. I saw an example program in msdn which searches all processes, but i dont really like to check all processes when i already got the handle to the window. Does anyone know a way to get the path from the executable from an OTHER program from which i have the handle?

EDIT. i tried GetWindowModuleFileName but this return the name of my own program.

I found a solution.
With winnt version you cant use GetWindowModuleFileName for other programs so i used GetModuleFileNameEx and EnumProcessModules. The big disadvantage is that non winnt versions dont have a GetModuleFileNameEx so you have to check the windows versions if its winnt or not :(.

The toolhelp functions (CreateToolhelp32Snapshot) are available on 95/98/ME/2000/XP but not NT4.0.

>> The big disadvantage is that non winnt versions dont have a GetModuleFileNameEx so you have to check the windows versions if its winnt or not <<

I assume you already know this but not calling a function is not enough to ensure the program will work on platforms where that function does not exist. For example, this program will fail to load on Windows 9x:

Code:

---

if (isWinNT)
{
    EnumProcessModules(...);
}

---

You can get true backwards compatibility you must use dynamic function loading. VC also has a feature that allows one to call a function normally but dynamic loading is used in the background called delayed loading.

Yes i know, i use LoadLibrary and GetProcAddress on the psapi dll.
But thanks anyway for the advise. Is there anyplace where i can find if psapidll is included in all winnt versions?.