Homebrew Running 3DSX from Homebrew App

[JackMacWindows]

Hello,
I want to make a simple launcher for my CFW 3DS. I want to have the launcher load with menuhax, replacing CtrBootManager. When I hold the Y key it will boot to the homebrew menu, otherwise it will boot to Luma3DS. I currently have this code:

#include <stdio.h>
#include <3ds.h>
#include <unistd.h>

PrintConsole screen, debug;
template <class T>
void sleep(T time) {usleep(time * 1000000);}

int main() {
    gfxInitDefault();
    consoleInit(GFX_TOP, &debug);
    consoleInit(GFX_BOTTOM, &screen);
    consoleSelect(&screen);
    printf("Checking keys...\n");
    sleep(.25);
    hidScanInput();
    if ((hidKeysDown() & KEY_Y) || (hidKeysHeld() & KEY_Y)) {
        printf("Loading Homebrew Menu...");
        sleep(2);
        //run("boot.3dsx");
    } else {
        printf("Loading Luma3DS...");
        sleep(2);
        //run("luma.3dsx");
    }
    return 0;
}

I have been looking for source code to show how to load, and all I found was the boot.c from the homebrew launcher, but I get many build errors when I include it; and I have tried the CtrBootManager loader.c, which does not do anything. How can I boot the .3dsx files?