SuspendThread

[Lecht123]

When is it necessary to suspend wow's main thread before injecting and executing a codecave function? Or is it mandatory? Can some functions cause problems? On some occasions, this locks up the wow client.

            ProcessThread wowMainThread = SThread.GetMainThread(clientProcess.Id);
            IntPtr hThread = SThread.OpenThread(wowMainThread.Id);

            uint movement = client.AllocateMemory(0x1024);

            client.Asm.Clear();
            client.Asm.AddLine("mov ebx, [{0}]", ObjectManager.staticClientConnection);
            client.Asm.AddLine("add ebx, {0}", ObjectManager.objectManagerOffset);
            client.Asm.AddLine("mov ebx, [ebx]");

            client.Asm.AddLine("fs mov eax, [0x2C]");
            client.Asm.AddLine("mov eax, [eax]");
            client.Asm.AddLine("add eax, 0x8");
            client.Asm.AddLine("mov dword [eax], ebx");

            client.Asm.AddLine("mov eax, {0}", System.Environment.TickCount);
            client.Asm.AddLine("mov ecx, {0}", client.ReadUInt((uint)WowOffsets.CInputControl));
            client.Asm.AddLine("push {0}", 0);
            client.Asm.AddLine("push eax");
            client.Asm.AddLine("push {0}", 1);
            client.Asm.AddLine("push {0}", (uint)Flag);
            client.Asm.AddLine("call {0}", (uint)WowOffsets.CGInputControl__SetControlBit_0);
            client.Asm.AddLine("retn");

            SThread.SuspendThread(hThread);
            client.Asm.InjectAndExecute(movement);
            SThread.ResumeThread(hThread);

            client.FreeMemory(movement);