Solved problem write byte in process

[bacicalupo]

please, I need to replace the byte (3E) with the byte (FF)

Imports System.io
Public Class Form1

    Private ammoDef As Integer() = {&H3E}
    Private ammoHack As Integer() = {&HFF}
    Private recoilDef As Integer() = {&H8B, &H16, &H8B, &H52, &H14, &H50, &H8D, &H4C, &H24, &H1C, &H51, &H8B, &HCE, &HFF, &HD2}
    Private recoilHack As Integer() = {&H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90}

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If CheckBox1.Checked = True Then
            patchFile(Application.StartupPath & "\esample.exe", &H1D2BD4E7, ammoHack)
        Else
            patchFile(Application.StartupPath & "\esample.exe", &H1D2BD4E7, ammoDef)
        End If
        If CheckBox2.Checked = True Then
            patchFile(Application.StartupPath & "\esample.exe", &H5AB0A, recoilHack)
        Else
            patchFile(Application.StartupPath & "\esample.exe", &H5AB0A, recoilDef)
        End If
    End Sub

    Private Sub patchFile(ByVal strLocation As String, ByVal hOffset As Integer, ByVal hBytes As Integer())
        Dim writeFile As BinaryWriter = New BinaryWriter(File.OpenWrite(strLocation))
        For i = 0 To hBytes.Count - 1
            writeFile.BaseStream.Position = hOffset + i
            writeFile.BaseStream.WriteByte(hBytes(i))
        Next
        writeFile.Dispose()
    End Sub

    Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged

    End Sub
End Class

 

[Styx]

You have taken the source from my example assaultcube patch and changed two bytes. This function does NOT write to memory, it was written to patch the file itself.

 

[till0sch]

please, I need to replace the byte (3E) with the byte (FF)

Imports System.io
Public Class Form1

    Private ammoDef As Integer() = {&H3E}
    Private ammoHack As Integer() = {&HFF}
    Private recoilDef As Integer() = {&H8B, &H16, &H8B, &H52, &H14, &H50, &H8D, &H4C, &H24, &H1C, &H51, &H8B, &HCE, &HFF, &HD2}
    Private recoilHack As Integer() = {&H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90, &H90}

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If CheckBox1.Checked = True Then
            patchFile(Application.StartupPath & "\crossfire.exe", &H1D2BD4E7, ammoHack)
        Else
            patchFile(Application.StartupPath & "\crossfire.exe", &H1D2BD4E7, ammoDef)
        End If
        If CheckBox2.Checked = True Then
            patchFile(Application.StartupPath & "\crossfire.exe", &H5AB0A, recoilHack)
        Else
            patchFile(Application.StartupPath & "\crossfire.exe", &H5AB0A, recoilDef)
        End If
    End Sub

    Private Sub patchFile(ByVal strLocation As String, ByVal hOffset As Integer, ByVal hBytes As Integer())
        Dim writeFile As BinaryWriter = New BinaryWriter(File.OpenWrite(strLocation))
        For i = 0 To hBytes.Count - 1
            writeFile.BaseStream.Position = hOffset + i
            writeFile.BaseStream.WriteByte(hBytes(i))
        Next
        writeFile.Dispose()
    End Sub

    Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged

    End Sub
End Class

View attachment 1910

Do you want to write into process or file?

 

[bacicalupo]

hi, write in process

 

[Styx]

hi, write in process

Then this function will not help you.

 

[till0sch]

As the names of some of the functions say, it writes to files not to processes (WriteFile etc.)

 

[emistz]

This might help https://guidedhacking.com/showthread.php?3434-MemoryUtility-A-Binary-Runtime-Modification-Library

 

[till0sch]

This might help https://guidedhacking.com/showthread.php?3434-MemoryUtility-A-Binary-Runtime-Modification-Library

Is it a .dll which needs to be added to the project?

 

[emistz]

Is it a .dll which needs to be added to the project?

I don't remember. I think I made it into a statically linked lib to be built into whatever project at compile time.