Private Declare Function GetModuleHandle Lib "KERNEL32" Alias "GetModuleHandleA" (ByVal lpModuleName As String) As Long
Private Declare Function GetProcAddress Lib "KERNEL32" (ByVal hModule As Long, ByVal lpProcName As String) As Long

Private Declare Function HeapAlloc Lib "KERNEL32" (ByVal hHeap As Long, ByVal dwFlags As Long, ByVal dwBytes As Long) As Long
Private Declare Function GetProcessHeap Lib "KERNEL32" () As Long
Private Declare Function HeapFree Lib "KERNEL32" (ByVal hHeap As Long, ByVal dwFlags As Long, ByRef lpMem As Any) As Long
Private Declare Function VirtualAllocEx Lib "KERNEL32" (ByVal hProcess As Long, ByRef lpAddress As Any, ByRef dwSize As Long, ByVal flAllocationType As Long, ByVal flProtect As Long) As Long
Private Declare Function WriteProcessMemory Lib "KERNEL32" (ByVal hProcess As Long, ByRef lpBaseAddress As Any, ByRef lpBuffer As Any, ByVal nSize As Long, ByRef lpNumberOfBytesWritten As Long) As Long
Private Declare Sub CopyMemory Lib "MSVBVM60" Alias "__vbaCopyBytes" (ByVal Size As Long, Dest As Any, Source As Any)

Private Declare Function CreateRemoteThread Lib "KERNEL32" (ByVal hProcess As Long, lpThreadAttributes As Any, ByVal dwStackSize As Long, lpStartAddress As Long, lpParameter As Any, ByVal dwCreationFlags As Long, lpThreadId As Long) As Long

Private Const MEM_COMMIT = &H1000
Private Const PAGE_EXECUTE_READWRITE As Long = &H40
Private Const HEAP_ZERO_MEMORY As Long = &H8

Private Function CreateRemoteThreadEx(hProcess As Long, _
                                      lpThreadAttributes As Variant, _
                                      dwStackSize As Long, _
                                      lpStartAddress As Long, _
                                      dwCreationFlags As Long, _
                                      lpThreadId As Long, _
                                      ParamArray vParameters() As Variant)
    Dim ASM_CALLGATE(39) As Byte
    Dim lpLocal As Long
    Dim lpRemote As Long
    Dim lpData As Long
    Dim lpCode As Long
    Dim dwAmount  As Long
    Dim dwDataSize As Long
    Dim dwCallSize  As Long
    Dim dwWritten  As Long
    
    Dim i As Long
    
   '{
        ' CALL $+0x1D
        ' PUSH EAX
        ' PUSH 90C35858 (code for POP EAX\nPOP EAX\nRETN)"
        ' PUSH MEM_RELEASE
        ' PUSH 1
        ' PUSH 00000000 (-> PUSH lpRemote)
        ' PUSH ESP
        ' ADD DWORD [ESP], 0x0C
        ' PUSH 00000000 (-> PUSH VirtualFree)
        ' RETN
        ' PUSH 00000000 (-> PUSH lpStartAddress)
        ' RETN
    '}
    
    For i = 0 To 39
        ASM_CALLGATE(i) = CByte(Choose(i + 1, &HE8, &H1D, &H0, &H0, &H0, &H50, &H68, &H58, &H58, &HC3, &H90, &H68, &H0, &H40, _
                                              &H0, &H0, &H6A, &H1, &H68, &H0, &H0, &H0, &H0, &H54, &H83, &H4, &H24, &HC, _
                                              &H68, &H0, &H0, &H0, &H0, &HC3, &H68, &H0, &H0, &H0, &H0, &HC3))
    Next i
    
    If UBound(vParameters) <> -1 Then
        dwAmount = UBound(vParameters)
        For i = 0 To dwAmount
            dwDataSize = dwDataSize + LenB(vParameters(i))
        Next i
        dwCallSize = UBound(ASM_CALLGATE) + dwAmount * (4 + 1) + dwDataSize
        
        'Allocate memory for callgate constructing (local process)
        lpLocal = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, dwCallSize)
        If lpLocal = 0 Then: GoTo Error
        
        'Allocate memory from remote process
        lpRemote = VirtualAllocEx(hProcess, 0&, dwCallSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE)
        If lpRemote = 0 Then: GoTo Error
        
        Call CopyMemory(4, ByVal VarPtr(ASM_CALLGATE(19)), lpRemote)
        Call CopyMemory(4, ByVal VarPtr(ASM_CALLGATE(35)), lpStartAddress)
        Call CopyMemory(4, ByVal VarPtr(ASM_CALLGATE(29)), GetProcAddress(GetModuleHandle("KERNEL32"), "VirtualFree"))
    End If
    
    Call WriteProcessMemory(hProcess, lpRemote, lpLocal, dwCallSize, dwWritten)
    Call HeapFree(GetProcessHeap(), 0, lpLocal)
    If dwWritten = 0 Then: GoTo Error

    CreateRemoteThreadEx = CreateRemoteThread(hProcess, lpThreadAttributes, dwStackSize, (lpRemote + dwDataSize), 0, dwCreationFlags, lpThreadId)
    Exit Function
Error:
    
End Function