startup.c

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

#define FILE_PATH "list.txt"

int main(int argc, char ** argv)
{
    FILE * fp = fopen(FILE_PATH, "r");

    if (!fp)
        return EXIT_FAILURE;

    char str[255];
    while(fgets(str, 255, fp))
    {
        STARTUPINFO info={sizeof(info)};
        PROCESS_INFORMATION processInfo;
        argv[0] = str;
        if (!CreateProcess(str, "open", NULL, NULL, false, CREATE_DEFAULT_ERROR_MODE | CREATE_NO_WINDOW | DETACHED_PROCESS, NULL, NULL, &info, &processInfo))
            return EXIT_FAILURE;
    }

    return EXIT_SUCCESS;
}