I’m new to C and am working with the Win32 API to create a process with CreateProcessW(). This is my first C program. It opens notepad.exe and outputs the process ID using dwProcessId. But the PID that is outputted is always different from the PID of the open notepad.exe process I see in Task Manager. Why is this?

C code:

#include <stdio.h>
#include <windows.h>

int main (void){

    STARTUPINFOW si = { sizeof(si) };
    PROCESS_INFORMATION pi = { 0 };

    if (!CreateProcessW(
        L"C:\Windows\System32\notepad.exe",
        NULL, // Command line arguments
        NULL, // Process security attributes
        NULL, // Thread security attributes
        FALSE, // Handle inheritance
        0, // Creation flags
        NULL, // Environment block
        NULL, // Current directory
        &si, // Startup information
        &pi)) // Process information
    {
        printf("(-) failed to create process, error: %ldn", GetLastError());
        return EXIT_FAILURE;
    }

    // Print PID
    printf("Process ID: %lun", pi.dwProcessId);

    Sleep(9000); // Wait for 5 seconds

    // Close process and thread handles
    CloseHandle(pi.hProcess);
    CloseHandle(pi.hThread);

    return EXIT_SUCCESS;
}

For example, the console output when run is “Process ID: 35692”, but when searching for Notepad in Task Manager, the PID shown is 20736.

What am I doing wrong?