A few functions from the old Razor911.dll
-------------------------------------------
BOOL sub_10001050()
{
  HWND v0; // eax@1
  HWND v1; // ebx@1
  void *v2; // eax@1
  void *v3; // esi@1
  void *v4; // ebx@11
  struct tagRECT Rect; // [sp+14h] [bp-5Ch]@1
  struct tagMSG Msg; // [sp+24h] [bp-4Ch]@5
  WNDCLASSEXW v8; // [sp+40h] [bp-30h]@1

  v8.cbSize = 48;
  v8.style = 64;
  v8.lpfnWndProc = (WNDPROC)sub_10001000;
  v8.cbClsExtra = 0;
  v8.cbWndExtra = 0;
  v8.hInstance = GetModuleHandleW(0);
  v8.hIcon = 0;
  v8.hCursor = 0;
  v8.hbrBackground = 0;
  v8.lpszMenuName = 0;
  v8.lpszClassName = L"Razor1911";
  v8.hIconSm = 0;
  RegisterClassExW(&v8);
  v0 = GetDesktopWindow();
  GetClientRect(v0, &Rect);
  v1 = CreateWindowExW(
         0,
         L"Razor1911",
         L"Razor 1911",
         0x80000000,
         (Rect.right - Rect.left - 800) >> 1,
         (Rect.bottom - Rect.top - 300) >> 1,
         800,
         300,
         0,
         0,
         v8.hInstance,
         0);
  v2 = operator new(0x58u);
  v3 = v2;
  if ( v2 )
  {
    *((float *)v2 + 6) = 0.0;
    *(_BYTE *)v2 = 1;
    *((_DWORD *)v2 + 7) = 0;
    *((_DWORD *)v2 + 8) = 0;
    *((_DWORD *)v2 + 11) = 0;
    *((_DWORD *)v2 + 12) = 0;
    *((_DWORD *)v2 + 14) = 0;
    *((_DWORD *)v2 + 15) = 0;
    *((_DWORD *)v2 + 16) = 0;
    *((_DWORD *)v2 + 21) = 0;
    QueryPerformanceFrequency((LARGE_INTEGER *)v2 + 1);
  }
  else
  {
    v3 = 0;
  }
  dword_10040E44 = v3;
  if ( !sub_10001350(v1) )
  {
    Msg.hwnd = 0;
    Msg.message = 0;
    Msg.wParam = 0;
    Msg.lParam = 0;
    Msg.time = 0;
    Msg.pt.x = 0;
    Msg.pt.y = 0;
    do
    {
      if ( PeekMessageW(&Msg, 0, 0, 0, 1u) )
      {
        TranslateMessage(&Msg);
        DispatchMessageW(&Msg);
      }
      else if ( sub_100016D0() )
      {
        DestroyWindow(v1);
      }
    }
    while ( Msg.message != 18 );
  }
  v4 = dword_10040E44;
  if ( dword_10040E44 )
  {
    sub_100012C0((int)dword_10040E44);
    operator delete(v4);
  }
  return UnregisterClassW(L"Razor1911", v8.hInstance);
}
-------------------------------------------------------
int __usercall sub_100012C0@<eax>(int a1@<esi>)
{
  int v1; // eax@5
  int v2; // eax@7
  int v3; // eax@9
  int v4; // eax@11
  int v5; // eax@13
  int result; // eax@15

  if ( *(_DWORD *)(a1 + 84) )
    sub_100020A0(*(void **)(a1 + 84));
  if ( *(_DWORD *)(a1 + 48) )
    DeleteObject(*(HGDIOBJ *)(a1 + 48));
  v1 = *(_DWORD *)(a1 + 64);
  if ( v1 )
  {
    (*(void (__stdcall **)(_DWORD))(*(_DWORD *)v1 + 8))(*(_DWORD *)(a1 + 64));
    *(_DWORD *)(a1 + 64) = 0;
  }
  v2 = *(_DWORD *)(a1 + 60);
  if ( v2 )
  {
    (*(void (__stdcall **)(_DWORD))(*(_DWORD *)v2 + 8))(*(_DWORD *)(a1 + 60));
    *(_DWORD *)(a1 + 60) = 0;
  }
  v3 = *(_DWORD *)(a1 + 56);
  if ( v3 )
  {
    (*(void (__stdcall **)(_DWORD))(*(_DWORD *)v3 + 8))(*(_DWORD *)(a1 + 56));
    *(_DWORD *)(a1 + 56) = 0;
  }
  v4 = *(_DWORD *)(a1 + 44);
  if ( v4 )
  {
    (*(void (__stdcall **)(_DWORD))(*(_DWORD *)v4 + 8))(*(_DWORD *)(a1 + 44));
    *(_DWORD *)(a1 + 44) = 0;
  }
  v5 = *(_DWORD *)(a1 + 32);
  if ( v5 )
  {
    (*(void (__stdcall **)(_DWORD))(*(_DWORD *)v5 + 8))(*(_DWORD *)(a1 + 32));
    *(_DWORD *)(a1 + 32) = 0;
  }
  result = *(_DWORD *)(a1 + 28);
  if ( result )
  {
    result = (*(int (__stdcall **)(_DWORD))(*(_DWORD *)result + 8))(*(_DWORD *)(a1 + 28));
    *(_DWORD *)(a1 + 28) = 0;
  }
  return result;
}
-------------------------------------------------------
char *__stdcall sub_1000462C(int a1, int a2, int a3, HANDLE Process)
{
  HWND v4; // esi@6
  DWORD v6; // eax@9
  char v7; // [sp+0h] [bp-90h]@1
  int v8; // [sp+10h] [bp-80h]@12
  LPVOID lpBaseAddress; // [sp+14h] [bp-7Ch]@15
  LPVOID v10; // [sp+18h] [bp-78h]@15
  SIZE_T NumberOfBytesRead; // [sp+40h] [bp-50h]@12
  int Buffer; // [sp+44h] [bp-4Ch]@1
  char v13; // [sp+48h] [bp-48h]@1

  Buffer = 1;
  qmemcpy(&v7, L"GTAIV.exe", 0x17u);
  qmemcpy(&v13, &unk_1001B240, 0x40u);
  if ( a2 == 43858 )
  {
    ReadProcessMemory(hProcess, Process, &v7, 0x40u, &NumberOfBytesRead);
    switch ( v8 )
    {
      case 18:
        WriteProcessMemory(hProcess, v10, &v13, 0x40u, &NumberOfBytesRead);
        break;
      case 100:
        WriteProcessMemory(hProcess, lpBaseAddress, &Buffer, 4u, &NumberOfBytesRead);
        break;
      case 51:
        return (char *)lpBaseAddress + (_DWORD)v10;
    }
  }
  else
  {
    if ( a2 == 43860 )
    {
      v4 = hWnd;
      hWnd = (HWND)Process;
      CreateThread(0, 0x1000u, (LPTHREAD_START_ROUTINE)sub_100047C4, Process, 0, (LPDWORD)&v7);
      return (char *)v4;
    }
    if ( a2 != 43869 )
      return (char *)1;
    if ( a3 == 1 )
    {
      hWnd = 0;
      hProcess = Process;
      v6 = GetProcessId(Process);
      sprintf(&v7, "v7_%04d", v6 ^ 0x19EA3FD3);
      CreateEventA(0, 1, 1, &v7);
      return (char *)100;
    }
    if ( a3 == 2 )
    {
      v4 = (HWND)calloc(1u, 0x14u);
      memcpy(v4, &v7, 0x12u);
      return (char *)v4;
    }
  }
  return 0;
}