I'm not making a P2C just don't want my cheat to be leaked so I want to attach it to the injector, which requires a login. Basically, I want to make it like a Pay2Cheat login system where you login and can just inject the DLL from there, not look through your files for a cheat to use. This is all the current code I have, but I can't seem to figure out how to get it to work. I just want the DLL to appear in the ListBox and when I click Inject, it loads the DLL from my references. Any help is appreciated.

Code:
Public Class PlainsInjector
    Private TargetProcessHandle As Integer
    Private pfnStartAddr As Integer
    Private pszLibFileRemote As String
    Private TargetBufferSize As Integer

    Public Const PROCESS_VM_READ = &H10
    Public Const TH32CS_SNAPPROCESS = &H2
    Public Const MEM_COMMIT = 4096
    Public Const PAGE_READWRITE = 4
    Public Const PROCESS_CREATE_THREAD = (&H2)
    Public Const PROCESS_VM_OPERATION = (&H8)
    Public Const PROCESS_VM_WRITE = (&H20)
    Dim DLLFileName As String
    Public Declare Function ReadProcessMemory Lib "kernel32" (
    ByVal hProcess As Integer,
    ByVal lpBaseAddress As Integer,
    ByVal lpBuffer As String,
    ByVal nSize As Integer,
    ByRef lpNumberOfBytesWritten As Integer) As Integer

    Public Declare Function LoadLibrary Lib "kernel32" Alias "LoadLibraryA" (
    ByVal lpLibFileName As String) As Integer

    Public Declare Function VirtualAllocEx Lib "kernel32" (
    ByVal hProcess As Integer,
    ByVal lpAddress As Integer,
    ByVal dwSize As Integer,
    ByVal flAllocationType As Integer,
    ByVal flProtect As Integer) As Integer

    Public Declare Function WriteProcessMemory Lib "kernel32" (
    ByVal hProcess As Integer,
    ByVal lpBaseAddress As Integer,
    ByVal lpBuffer As String,
    ByVal nSize As Integer,
    ByRef lpNumberOfBytesWritten As Integer) As Integer

    Public Declare Function GetProcAddress Lib "kernel32" (
    ByVal hModule As Integer, ByVal lpProcName As String) As Integer

    Private Declare Function GetModuleHandle Lib "Kernel32" Alias "GetModuleHandleA" (
    ByVal lpModuleName As String) As Integer

    Public Declare Function CreateRemoteThread Lib "kernel32" (
    ByVal hProcess As Integer,
    ByVal lpThreadAttributes As Integer,
    ByVal dwStackSize As Integer,
    ByVal lpStartAddress As Integer,
    ByVal lpParameter As Integer,
    ByVal dwCreationFlags As Integer,
    ByRef lpThreadId As Integer) As Integer

    Public Declare Function OpenProcess Lib "kernel32" (
    ByVal dwDesiredAccess As Integer,
    ByVal bInheritHandle As Integer,
    ByVal dwProcessId As Integer) As Integer

    Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (
    ByVal lpClassName As String,
    ByVal lpWindowName As String) As Integer

    Private Declare Function CloseHandle Lib "kernel32" Alias "CloseHandleA" (
    ByVal hObject As Integer) As Integer

    Dim ExeName As String = IO.Path.GetFileNameWithoutExtension(Application.ExecutablePath)
    Private Sub Inject()
        On Error GoTo 1
        Timer1.Stop()
        Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text)
        TargetProcessHandle = OpenProcess(PROCESS_CREATE_THREAD Or PROCESS_VM_OPERATION Or PROCESS_VM_WRITE, False, TargetProcess(0).Id)
        pszLibFileRemote = "C:\Users\maina\Documents\Visual Studio 2017\Projects\Plains Injector\Plains Injector\Resources\Plains.dll"
        pfnStartAddr = GetProcAddress(GetModuleHandle("Kernel32"), "LoadLibraryA")
        TargetBufferSize = 1 + Len(pszLibFileRemote)
        Dim Rtn As Integer
        Dim LoadLibParamAdr As Integer
        LoadLibParamAdr = VirtualAllocEx(TargetProcessHandle, 0, TargetBufferSize, MEM_COMMIT, PAGE_READWRITE)
        Rtn = WriteProcessMemory(TargetProcessHandle, LoadLibParamAdr, pszLibFileRemote, TargetBufferSize, 0)
        CreateRemoteThread(TargetProcessHandle, 0, 0, pfnStartAddr, LoadLibParamAdr, 0, 0)
        CloseHandle(TargetProcessHandle)
1:      Me.Show()
    End Sub

    Private Sub Injector_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Injector.Name = "Injector"
    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        If IO.File.Exists("C:\Users\maina\Documents\Visual Studio 2017\Projects\Plains Injector\Plains Injector\Resources\Plains.dll") Then
            Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text)
            If TargetProcess.Length = 0 Then
                Me.Injector.Items.Add(DLLFileName)
                Call Inject()
                If CheckBox1.Checked = True Then
                    End
                Else
                End If
            End If
        Else
        End If
    End Sub