#define WIN32_LEAN_AND_MEAN

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

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
    HANDLE hSnap;
    if((hSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)) == INVALID_HANDLE_VALUE){
        MessageBox(NULL, "CreateToolhelp32Snapshot", "Error", MB_OK);
        return -1;
    }

    PROCESSENTRY32 pe;
    pe.dwSize = sizeof(pe);

    UINT len = 0;
    TCHAR buf[4048];
    
    BOOL bResult = Process32First(hSnap, &pe);
    while(bResult){
        len += wsprintf(buf + len, TEXT("%s (0x%08x)\n"), pe.szExeFile, pe.th32ProcessID);
        bResult = Process32Next(hSnap, &pe);
    }

    CloseHandle(hSnap);
    MessageBox(NULL, buf , "OK", MB_OK);

    return 0;
}