what is "WriteInteger"

Public Sub WriteInteger(ByVal ProcessName As String, ByVal Address As Integer, ByVal Value As Integer, Optional ByVal nsize As Integer = 4)
        If ProcessName.EndsWith(".exe") Then
            ProcessName = ProcessName.Replace(".exe", "")
        End If
        Dim MyP As Process() = Process.GetProcessesByName(ProcessName)
        If MyP.Length = 0 Then
            MsgBox(ProcessName & " isn't open!", vbExclamation, "Error")
            Exit Sub
        End If
        Dim hProcess As IntPtr = OpenProcess(PROCESS_ALL_ACCESS, 0, MyP(0).Id)
        If hProcess = IntPtr.Zero Then
            MsgBox("Failed to open " & ProcessName & "!", vbExclamation, "Error")
            Exit Sub
        End If

        Dim hAddress, vBuffer As Integer
        hAddress = Address
        vBuffer = Value
        WriteProcessMemory1(hProcess, hAddress, CInt(vBuffer), nsize, 0)
        CloseHandle(hProcess)
    End Sub