Get Process ID by Name

 

DWORD CChatMessageDlg::GetProcessId(LPCTSTR pszProcessName)
...{
    BOOL bFound = FALSE;
    DWORD aProcesses [1024], cbNeeded, cProcesses;
    unsigned int i;
        
    // Enumerate all processes
    if (!EnumProcesses(aProcesses, sizeof(aProcesses), &cbNeeded))
        return FALSE;

    // Calculate how many process identifiers were returned.
    cProcesses = cbNeeded / sizeof(DWORD);

    TCHAR szEXEName[MAX_PATH] = ...{0};
    // Loop through all process to find the one that matches
    // the one we are looking for
    for (i = 0; i < cProcesses; i++)
    ...{
        // Get a handle to the process
        HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION |
                          PROCESS_VM_READ, FALSE, aProcesses[i]);
    
        // Get the process name
        if (NULL != hProcess)
        ...{
            HMODULE hMod;
            DWORD cbNeeded;
        
            if(EnumProcessModules(hProcess, &hMod, 
                                  sizeof(hMod), &cbNeeded))
            ...{
                //Get the name of the exe file
                GetModuleBaseName(hProcess, hMod, szEXEName, 
                    sizeof(szEXEName)/sizeof(TCHAR));

                if (_tcsicmp(szEXEName, pszProcessName) == 0)
                ...{
                    bFound = TRUE;
                    CloseHandle(hProcess);
                    break;
                }
            }
            CloseHandle(hProcess);
        }    
    }

    return bFound ? aProcesses[i] : 0;
}

 

Note:

Header	Declared in Psapi.h.
Library	Link to Psapi.lib.