How to find out the path of a process by its name?

Question

C++ / C#

Good evening.
I looked at many guides and manuals, but did not find anything suitable.
It is necessary for the console program to search for the path of the running process, or rather by its name.
Windows

Answer 1

Will work on Windows Vista and newer. The QueryFullProcessImageName function is used .

#include <windows.h>
#include <tlhelp32.h>

int _tmain(int argc, _TCHAR* argv[])
{
    PROCESSENTRY32 entry;
    entry.dwSize = sizeof(PROCESSENTRY32);

    HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL);

    if (Process32First(snapshot, &entry) == TRUE) {
        while (Process32Next(snapshot, &entry) == TRUE) {
            if (_tcsicmp(entry.szExeFile, _T("explorer.exe")) == 0) {
                HANDLE hProcess = OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, FALSE, entry.th32ProcessID);

                if (hProcess) {
                    TCHAR path[MAX_PATH];
                    DWORD cchExeName = MAX_PATH;
                    
                    if (QueryFullProcessImageName(hProcess, 0, path, &cchExeName) != 0) {
                        _tprintf(_T("%s\r\n"), path);
                    } 

                    CloseHandle(hProcess);
                }   
            }
        }
    }

    CloseHandle(snapshot);

    return 0;
}

Answer 2

Find HANDLE. GetModuleFileNameExA function .