Simple Injector

Public Class Form1
    Private Property result As Short
    Dim dlls As New Dictionary(Of String, String)
    Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Integer, ByVal bInheritHandle As Integer, ByVal dwProcessId As Integer) As Integer
    Private 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
    Private Declare Function WriteProcessMemory Lib "kernel32" (ByVal hProcess As Integer, ByVal lpBaseAddress As Integer, ByVal lpBuffer() As Byte, ByVal nSize As Integer, ByVal lpNumberOfBytesWritten As UInteger) As Boolean
    Private 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
    Private 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, ByVal lpThreadId As Integer) As Integer
    Private Declare Function WaitForSingleObject Lib "kernel32" (ByVal hHandle As Integer, ByVal dwMilliseconds As Integer) As Integer
    Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Integer) As Integer

    Private Function Inject(ByVal pID As Integer, ByVal dllLocation As String) As Boolean
        If IntPtr.Size = 8 Then Throw New ArgumentException("Please make sure this program is compiled as x86, not x64. Memory functions don't work so well otherwise.")
        Dim hProcess As Integer = OpenProcess(&H1F0FFF, 1, pID)
        If hProcess = 0 Then Return False
        Dim dllBytes As Byte() = System.Text.Encoding.ASCII.GetBytes(dllLocation)
        Dim allocAddress As Integer = VirtualAllocEx(hProcess, 0, dllBytes.Length, &H1000, &H4)
        If allocAddress = Nothing Then Return False
        Dim kernelMod As Integer = GetModuleHandle("kernel32.dll")
        Dim loadLibAddr = GetProcAddress(kernelMod, "LoadLibraryA")
        If kernelMod = 0 OrElse loadLibAddr = 0 Then Return False
        WriteProcessMemory(hProcess, allocAddress, dllBytes, dllBytes.Length, 0)
        Dim libThread As Integer = CreateRemoteThread(hProcess, 0, 0, loadLibAddr, allocAddress, 0, 0)
        If libThread = 0 Then
            Return False
        Else
            WaitForSingleObject(libThread, 5000)
            CloseHandle(libThread)
        End If
        CloseHandle(hProcess)
        MsgBox("Successfully Injected " & dlls.Count & " Dlls to Crossfire.exe.", vbCrLf, "Lucasheer715 @ MPGH.Net")
        Me.Close()
        Return True
    End Function

    Private Sub OpenFileDialog1_FileOk(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs)
        Dim FileName As String
        FileName = OpenFileDialog1.FileName
        Dim DllFileName As String = FileName
        OpenFileDialog1.Multiselect = True
        Try
            dlls.Add(DllFileName, OpenFileDialog1.FileName)
            MsgBox(DllFileName + " was succesfully Added to .DLLs.", vbCrLf, "Waiting for crossfire.exe")
        Catch ex As Exception
            MsgBox("The .DLLs/.DLL could not be added :(", vbCrLf, "Try restarting to resolve this problem.")
        End Try
    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        If dlls.Count = 0 Then
            'do nothing, u could add another openfiledialog here.
            Dim TargetProcess As Process() = Process.GetProcessesByName("Crossfire")
            If TargetProcess.Length = 0 Then
                'do nothing
            Else
                Dim ProcID As Integer = Process.GetProcessesByName("Crossfire")(0).Id
                For Each inj As KeyValuePair(Of String, String) In dlls
                    Try
                        Inject(ProcID, inj.Value)
                        Timer1.Stop()
                    Catch ex As Exception
                        MsgBox("Failed to start injection :(", vbCrLf, "Please retry :)")
                    End Try
                Next
            End If
        End If
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Timer1.Interval = 50
        Timer1.Enabled = True
        hideform()
        browsedlls()
    End Sub

    Private Sub hideform()
        Me.FormBorderStyle = Windows.Forms.FormBorderStyle.None
        Me.Size = New System.Drawing.Size(0, 0)
        Me.Hide()
    End Sub

    Private Sub browsedlls()
        OpenFileDialog1.Filter = "DLL (*.dll) |*.dll|All Files (*.*) |*.*"
        OpenFileDialog1.ShowDialog()
        OpenFileDialog1.ShowReadOnly = True
    End Sub
End Class