2 buttons
5 labels
2 textboxes
2 timers

paste this:

<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        Try
            If disposing AndAlso components IsNot Nothing Then
                components.Dispose()
            End If
        Finally
            MyBase.Dispose(disposing)
        End Try
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.components = New System.ComponentModel.Container()
        Me.Button1 = New System.Windows.Forms.Button()
        Me.Timer1 = New System.Windows.Forms.Timer(Me.components)
        Me.TextBox1 = New System.Windows.Forms.TextBox()
        Me.TextBox2 = New System.Windows.Forms.TextBox()
        Me.OpenFileDialog1 = New System.Windows.Forms.OpenFileDialog()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.Label2 = New System.Windows.Forms.Label()
        Me.Label3 = New System.Windows.Forms.Label()
        Me.Label4 = New System.Windows.Forms.Label()
        Me.Label = New System.Windows.Forms.Label()
        Me.Button2 = New System.Windows.Forms.Button()
        Me.Timer2 = New System.Windows.Forms.Timer(Me.components)
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Font = New System.Drawing.Font("Microsoft Sans Serif", 11.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Button1.Location = New System.Drawing.Point(0, 149)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(151, 33)
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "BROWSE..."
        Me.Button1.UseVisualStyleBackColor = True
        '
        'Timer1
        '
        '
        'TextBox1
        '
        Me.TextBox1.BackColor = System.Drawing.Color.Black
        Me.TextBox1.Font = New System.Drawing.Font("Microsoft Sans Serif", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.TextBox1.ForeColor = System.Drawing.Color.Black
        Me.TextBox1.Location = New System.Drawing.Point(221, 188)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(205, 22)
        Me.TextBox1.TabIndex = 1
        '
        'TextBox2
        '
        Me.TextBox2.BackColor = System.Drawing.Color.Black
        Me.TextBox2.BorderStyle = System.Windows.Forms.BorderStyle.None
        Me.TextBox2.Font = New System.Drawing.Font("Microsoft Sans Serif", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.TextBox2.ForeColor = System.Drawing.Color.Black
        Me.TextBox2.Location = New System.Drawing.Point(221, 162)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.Size = New System.Drawing.Size(205, 15)
        Me.TextBox2.TabIndex = 2
        '
        'OpenFileDialog1
        '
        Me.OpenFileDialog1.FileName = "OpenFileDialog1"
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(247, 9)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(39, 13)
        Me.Label1.TabIndex = 3
        Me.Label1.Text = "Label1"
        '
        'Label2
        '
        Me.Label2.AutoSize = True
        Me.Label2.Location = New System.Drawing.Point(157, 240)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(50, 13)
        Me.Label2.TabIndex = 4
        Me.Label2.Text = "STATUS"
        '
        'Label3
        '
        Me.Label3.AutoSize = True
        Me.Label3.Font = New System.Drawing.Font("Microsoft Sans Serif", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label3.Location = New System.Drawing.Point(142, 191)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(73, 16)
        Me.Label3.TabIndex = 5
        Me.Label3.Text = "PROCESS"
        '
        'Label4
        '
        Me.Label4.AutoSize = True
        Me.Label4.Font = New System.Drawing.Font("Microsoft Sans Serif", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label4.Location = New System.Drawing.Point(183, 166)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(32, 16)
        Me.Label4.TabIndex = 6
        Me.Label4.Text = "DLL"
        '
        'Label
        '
        Me.Label.AutoSize = True
        Me.Label.Font = New System.Drawing.Font("Segoe Script", 36.0!, CType((System.Drawing.FontStyle.Bold Or System.Drawing.FontStyle.Italic), System.Drawing.FontStyle), System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label.ForeColor = System.Drawing.Color.Black
        Me.Label.Location = New System.Drawing.Point(12, 28)
        Me.Label.Name = "Label"
        Me.Label.Size = New System.Drawing.Size(429, 80)
        Me.Label.TabIndex = 7
        Me.Label.Text = "DLL INJECTOR"
        '
        'Button2
        '
        Me.Button2.Font = New System.Drawing.Font("Segoe Print", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Button2.Location = New System.Drawing.Point(26, 233)
        Me.Button2.Name = "Button2"
        Me.Button2.Size = New System.Drawing.Size(87, 27)
        Me.Button2.TabIndex = 8
        Me.Button2.Text = "EXIT"
        Me.Button2.UseVisualStyleBackColor = True
        '
        'Timer2
        '
        Me.Timer2.Enabled = True
        Me.Timer2.Interval = 60
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.BackColor = System.Drawing.Color.Black
        Me.ClientSize = New System.Drawing.Size(439, 262)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Label)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Button1)
        Me.ForeColor = System.Drawing.Color.Red
        Me.Name = "Form1"
        Me.Text = "DLL injector"
        Me.ResumeLayout(False)
        Me.PerformLayout()

    End Sub
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Timer1 As System.Windows.Forms.Timer
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents OpenFileDialog1 As System.Windows.Forms.OpenFileDialog
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents Label As System.Windows.Forms.Label
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Timer2 As System.Windows.Forms.Timer

End Class

2ND 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 Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        My.Computer.Audio.Play(My.Resources.CLOCKS, AudioPlayMode.BackgroundLoop)

        Button1.Text = "Browse..."
        Label1.Text = "Waiting for users input..."
        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
        Else

        End If

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.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.TextBox2.Text = (DllFileName)
    End Sub

    Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
        If Label.ForeColor = Color.Black Then
            Label.ForeColor = Color.Red
        ElseIf Label.ForeColor = Color.Red Then
            Label.ForeColor = Color.Purple
        ElseIf Label.ForeColor = Color.Purple Then
            Label.ForeColor = Color.Green
        ElseIf Label.ForeColor = Color.Green Then
            Label.ForeColor = Color.Blue
        ElseIf Label.ForeColor = Color.Blue Then
            Label.ForeColor = Color.Black
        End If
    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Me.Close()
    End Sub
End Class