Error: [Expression expected] using ByVal modifier - vb.net

Question

I was hoping to get help from you, because I am encountering errors for a project using VB.net. I am having errors in using the ByVal modifier. And the 7 errors all says "Expression Expected".
I get Errors on lines 97, 103, 103, 112, 112, 146, and 146. A total of 7 Errors.
Here they are:
97:
ret = VirtualQueryEx(hProcess, ByVal lpMem, mbi, lLenMBI)
103:
ReadProcessMemory(hProcess, ByVal mbi.BaseAddress, ByVal sBuffer, mbi.RegionSize, lWritten)
112:
Call WriteProcessMemory(hProcess, ByVal CalcAddress - 1, ByVal sReplaceString, Len(sReplaceString), lWritten)
146:
test_hwnd = FindWindow(ByVal 0&, ByVal 0&)
Here is the complete code:
Option Explicit On
Imports System.Text
Imports System
Imports Microsoft.VisualBasic
Public Class Form1
Public Structure OSVERSIONINFO
Dim dwOSVersionInfoSize As Long
Dim dwMajorVersion As Long
Dim dwMinorVersion As Long
Dim dwBuildNumber As Long
Dim dwPlatformId As Long
Dim szCSDVersion As String ' 128
End Structure
Public Structure MEMORY_BASIC_INFORMATION ' 28 bytes
Dim BaseAddress As Long
Dim AllocationBase As Long
Dim AllocationProtect As Long
Dim RegionSize As Long
Dim State As Long
Dim Protect As Long
Dim lType As Long
End Structure
Public Structure SYSTEM_INFO ' 36 Bytes
Dim dwOemID As Long
Dim dwPageSize As Long
Dim lpMinimumApplicationAddress As Long
Dim lpMaximumApplicationAddress As Long
Dim dwActiveProcessorMask As Long
Dim dwNumberOrfProcessors As Long
Dim dwProcessorType As Long
Dim dwAllocationGranularity As Long
Dim wProcessorLevel As Integer
Dim wProcessorRevision As Integer
End Structure
Private Declare Function GetVersionEx Lib "kernel32" Alias "GetVersionExA" (ByVal LpVersionInformation As OSVERSIONINFO) As Long
Private Declare Function VirtualQueryEx& Lib "kernel32" (ByVal hProcess As Long, ByVal lpAddress As Short, <System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.AsAny)> ByVal o As Object, ByVal lpBuffer As MEMORY_BASIC_INFORMATION, ByVal dwLength As Long)
Private Declare Sub GetSystemInfo Lib "kernel32" (ByVal lpSystemInfo As SYSTEM_INFO)
Private Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, ByVal blnheritHandle As Long, ByVal dwAppProcessId As Long) As Long
Private Declare Function CloseHandle Lib "kernel32" (ByVal hObject As Long) As Long
Private Declare Function ReadProcessMemory Lib "kernel32" (ByVal hProcess As Long, ByVal lpBaseAddress As Short, <System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.AsAny)> ByVal o As Object, ByVal lpBuffer As Short, <System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.AsAny)> ByVal o As Object, ByVal nSize As Long, ByVal lpNumberOfBytesWritten As Long) As Long
Private Declare Function WriteProcessMemory Lib "kernel32" (ByVal hProcess As Long, ByVal lpBaseAddress As Short, <System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.AsAny)> ByVal o As Object, ByVal lpBuffer As Short, <System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.AsAny)> ByVal o As Object, ByVal nSize As Long, ByVal lpNumberOfBytesWritten As Long) As Long
Private Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hWnd As Long, ByVal lpdwProcessId As Long) As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As Long, ByVal lpWindowName As Long) As Long
Private Declare Function GetParent Lib "user32" (ByVal hWnd As Long) As Long
Private Declare Function GetWindow Lib "user32" (ByVal hWnd As Long, ByVal wCmd As Long) As Long
Const GW_HWNDNEXT = 2
Private Declare Function InvalidateRect Lib "user32" (ByVal hWnd As Long, ByVal lpRect As Long, ByVal bErase As Long) As Long
Const PROCESS_VM_READ = (&H10)
Const PROCESS_VM_WRITE = (&H20)
Const PROCESS_VM_OPERATION = (&H8)
Const PROCESS_QUERY_INFORMATION = (&H400)
Const PROCESS_READ_WRITE_QUERY = PROCESS_VM_READ + PROCESS_VM_WRITE + PROCESS_VM_OPERATION + PROCESS_QUERY_INFORMATION
Const MEM_PRIVATE& = &H20000
Const MEM_COMMIT& = &H1000
'================================================================================================================================================================='
'===============================================================Start of FUNCTION CODES==========================================================================='
'================================================================================================================================================================='
'Add 3 labels, 3 textboxes and 1 commandbutton on form
Private Sub Command1_Click()
Dim srcEncoding As Encoding
Dim dstEncoding As Encoding
Dim bytes As Byte()
Dim returnValue As Byte()
Dim pid As Long, hProcess As Long, hWin As Long
Dim lpMem As Long, ret As Long, lLenMBI As Long
Dim lWritten As Long, CalcAddress As Long, lPos As Long
Dim sBuffer As String
Dim sSearchString As String, sReplaceString As String
Dim si As SYSTEM_INFO
Dim mbi As MEMORY_BASIC_INFORMATION
sSearchString = Text2.Text
sReplaceString = Text3.Text & Chr(0)
pid = Shell(Text1.Text) 'launch application (calc.exe in this sample)
hWin = InstanceToWnd(pid) 'get handle of launched window - only to repaint it after changes
'Open process with required access
hProcess = OpenProcess(PROCESS_READ_WRITE_QUERY, False, pid)
lLenMBI = Len(mbi)
'Determine applications memory addresses range
Call GetSystemInfo(si)
lpMem = si.lpMinimumApplicationAddress
'Scan memory
Do While lpMem < si.lpMaximumApplicationAddress
mbi.RegionSize = 0
ret = VirtualQueryEx(hProcess, ByVal lpMem, mbi, lLenMBI)
If ret = lLenMBI Then
If ((mbi.lType = MEM_PRIVATE) And (mbi.State = MEM_COMMIT)) Then ' this block is In use by this process
If mbi.RegionSize > 0 Then
sBuffer = String.Equals(mbi.RegionSize, 0)
'Read region into string
ReadProcessMemory(hProcess, ByVal mbi.BaseAddress, ByVal sBuffer, mbi.RegionSize, lWritten)
'Check if region contain search string
lPos = InStr(1, sBuffer, sSearchString, vbTextCompare)
If lPos Then
CalcAddress = mbi.BaseAddress + lPos
Me.Show()
ret = MsgBox("Search string was found at address " & CalcAddress & "." & vbCrLf & "Do you want to replace it?", vbInformation + vbYesNo, "VB-O-Matic")
If ret = vbYes Then
'Replace string in virtual memory
Call WriteProcessMemory(hProcess, ByVal CalcAddress - 1, ByVal sReplaceString, Len(sReplaceString), lWritten)
'Redraw window
InvalidateRect(hWin, 0, 1)
End If
Exit Do
End If
End If
End If
'Increase base address for next searching cicle. Last address may overhead max Long value (Windows use 2GB memory, which is near max long value), so add Error checking
On Error GoTo Finished
lpMem = mbi.BaseAddress + mbi.RegionSize
On Error GoTo 0
Else
Exit Do
End If
Loop
Finished:
CloseHandle(hProcess)
End Sub
Private Sub Form_Load()
'Caption = "VB-O-Matic"
Label1.Text = "Start application:"
Label2.Text = "String to find:"
Label3.Text = "Replace with:"
Text1.Text = "Calc.exe"
Text2.Text = "Backspace"
Text3.Text = "VB-O-Matic"
Command1.Text = "&Launch It!"
End Sub
Private Function InstanceToWnd(ByVal target_pid As Long) As Long
Dim test_hwnd As Long
Dim test_pid As Long
Dim test_thread_id As Long
test_hwnd = FindWindow(ByVal 0&, ByVal 0&)
Do While test_hwnd <> 0
If GetParent(test_hwnd) = 0 Then
test_thread_id = GetWindowThreadProcessId(test_hwnd, test_pid)
If test_pid = target_pid Then
InstanceToWnd = test_hwnd
Exit Do
End If
End If
test_hwnd = GetWindow(test_hwnd, GW_HWNDNEXT)
Loop
End Function
End Class

Answer 1

Remove the ByVals in your function calls. Those functions already have their parameters declared as ByVal - you don't need to put ByVal in the calls to those functions as well.