How To Make An Advanced Injector

Code:
Public Class Form1 
    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 ' If error occurs, app will close without any error messages 
        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 = OpenFileDialog1.FileName 
        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 OpenFileDialog1_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles OpenFileDialog1.FileOk 

    End Sub 

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load 
        Button1.Text = "Clear Selected" 
        Label1.Text = "Waiting for Process Start..." 
        Timer1.Interval = 50 
        Timer1.Start() 

    End Sub 

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick 
        If IO.File.Exists(OpenFileDialog1.FileName) Then 
            Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text) 
            If TargetProcess.Length = 0 Then 
                Me.Label1.Text = ("Waiting for " + TextBox1.Text + ".exe...") 
            Else 
                Timer1.Stop() 
                Me.Label1.Text = "Successfully Injected!" 
                Call Inject() 



            End If 
        End If 


    End Sub 


    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click 
        For i As Integer = (Dlls.SelectedItems.Count - 1) To 0 Step -1 
            Dlls.Items.Remove(Dlls.SelectedItems(i)) 
        Next 

    End Sub 

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click 
        TextBox1.Clear() 

    End Sub 

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click 
        Dlls.Items.Clear() 

    End Sub 

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click 
        OpenFileDialog1.Filter = "DLL (*.dll) |*.dll|(*.*) |*.*" 
        OpenFileDialog1.ShowDialog() 
        Dim FileName As String 
        FileName = OpenFileDialog1.FileName.Substring(OpenFileDialog1.FileName.LastIndexOf("\")) 
        Dim DllFileName As String = FileName.Replace("\", "") 
        Me.Dlls.Items.Add(DllFileName) 

    End Sub 
    Private Function GetAsyncKeyState(ByVal vKey As Integer) As Short 

        If GetAsyncKeyState(Keys.F12) Then 
            If IO.File.Exists(OpenFileDialog1.FileName) Then 
                Dim TargetProcess As Process() = Process.GetProcessesByName(TextBox1.Text) 
                If TargetProcess.Length = 0 Then 

                    Me.Label1.Text = ("Waiting for " + TextBox1.Text + ".exe Injection(F12)...") 
                Else 
                    Timer1.Stop() 
                    Me.Label1.Text = "Successfully Injected!" 
                    Call Inject() 
                    ' If CheckBox1.Checked = True Then 
                    'Me.Close() 
                    'Else