Integer error while using int64

Imports System.Runtime.InteropServices
Imports System.Text
Public Class WriterClass

Dim ProcList As Process()

#Region "Basic Stuff"
<DllImport("kernel32.dll")> _
Private Shared Function ReadProcessMemory(hProcess As IntPtr, lpBaseAddress As IntPtr, <[In](), Out()> buffer As Byte(), size As UInt32, ByRef lpNumberOfBytesWritten As IntPtr) As Int32
End Function
<DllImport("kernel32.dll")> _
Private Shared Function WriteProcessMemory(hProcess As IntPtr, lpBaseAddress As IntPtr, <[In](), Out()> buffer As Byte(), size As UInt32, ByRef lpNumberOfBytesWritten As IntPtr) As Int32
End Function
<DllImport("user32.dll", CharSet:=CharSet.Auto, ExactSpelling:=True)> _
Public Shared Function GetKeyState(ByVal virtualKeyCode As Keys) As Short
End Function
Private pHandel As IntPtr
Private ProcessModule As ProcessModule
Public BaseAddress As Integer
Public Function Process_Handle(ProcessName As String) As Boolean
Try
ProcList = Process.GetProcessesByName(ProcessName)
If ProcList.Length = 0 Then
Return False
Else
pHandel = ProcList(0).Handle
ProcessModule = ProcList(0).MainModule
BaseAddress = ProcessModule.BaseAddress
Return True
End If
Catch ex As Exception
Console.WriteLine("Process_Handle - " + ex.Message)
Return False
End Try
End Function
Private Function Read(Address As Integer, Length As Integer) As Byte()
Dim Buffer As Byte() = New Byte(Length - 1) {}
Dim Zero As IntPtr = IntPtr.Zero
ReadProcessMemory(pHandel, New IntPtr(Address), Buffer, UInt32.Parse(Buffer.Length), Zero)
Return Buffer
End Function
Private Sub Write(Address As Integer, Value As Integer)
Dim Buffer As Byte() = BitConverter.GetBytes(Value)
Dim Zero As IntPtr = IntPtr.Zero
WriteProcessMemory(pHandel, New IntPtr(Address), Buffer, UInt32.Parse(Buffer.Length), Zero)
End Sub
#End Region

'This is the part you want to edit
#Region "Write Functions (Integer & String)"
Public Sub WriteInteger(Address As Integer, Value As Integer)
Write(Address, Value)
End Sub
Public Sub WriteString(Address As Integer, Text As String)
Dim Buffer As Byte() = New ASCIIEncoding().GetBytes(Text)
Dim Zero As IntPtr = IntPtr.Zero
WriteProcessMemory(pHandel, New IntPtr(Address), Buffer, UInt32.Parse(Buffer.Length), Text.Length)
End Sub
Public Sub WriteFloat(Address As Integer, Float As Single)
Dim Buffer As Byte() = BitConverter.GetBytes(Float)
Dim Zero As IntPtr = IntPtr.Zero
WriteProcessMemory(pHandel, New IntPtr(Address), Buffer, 4, Zero)
End Sub
Public Sub WriteBytes(Address As Integer, Bytes As Byte())
Dim Zero As IntPtr = IntPtr.Zero
WriteProcessMemory(pHandel, New IntPtr(Address), Bytes, CUInt(Bytes.Length), Zero)
End Sub
Public Sub WriteNOP(Address As Integer)
Dim Buffer As Byte() = New Byte() {&H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90}
Dim Zero As IntPtr = IntPtr.Zero
WriteProcessMemory(pHandel, New IntPtr(Address), Buffer, UInt32.Parse(Buffer.Length), Zero)
End Sub


#End Region
#Region "Read Functions (Integer & String)"
Public Function ReadInteger(Address As Integer, Optional Length As Integer = 4) As Integer
Return BitConverter.ToInt32(Read(Address, Length), 0)
End Function
Public Function ReadFloat(Address As Integer, Optional Length As Integer = 4) As Double
Return BitConverter.ToSingle(Read(Address, Length), 0)
End Function
Public Function ReadString(Address As Integer, Optional Length As Integer = 4) As String
Return New ASCIIEncoding().GetString(Read(Address, Length))
End Function
Public Function ReadBytes(Address As Integer, Length As Integer) As Byte()
Return Read(Address, Length)
End Function
#End Region
#Region "Extra"
Public Function HotKey(Key As Keys) As Boolean
Return Convert.ToBoolean(GetKeyState(Key))
End Function
Private Check_res As Boolean = True
Public Function Check_Value(Value As String) As Integer
For Each a As Char In Value
If Char.IsNumber(a, 0) Then
Check_res = True
Else
Check_res = False
Return 0
Exit For
End If
Next
Return Convert.ToInt32(Value)
End Function
#End Region


End Class