Wiki: Example 7 Step 1

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Please choose a tutorial page:

• Fundamentals -- Information about C
• Tools
• Registers
• Simple Instructions
• Example 1 -- SC CDKey Initial Verification
• Example 2 -- SC CDKey Shuffle
• Example 2b -- SC CDKey Final Decode
• The Stack
  • Stack Example
• Functions
• Example 3 -- Storm.dll SStrChr
• Assembly Summary
• Machine Code
• Example 4 -- Smashing the Stack
• Cracking a Game
• Example 5 -- Cracking a game
• Example 6 -- Writing a keygen
• .dll Injection and Patching
• Memory Searching
• Example 7 -- Writing a cheat for Starcraft (1.05)
  • Example 7 Step 1 -- Displaying Messages
  • Example 7 Step 1b -- Above, w/ func ptrs
  • Example 7 Final
• Example 8 -- Getting IX86.dll files
• 16-bit Assembly
• Example 9 -- Keygen for a 16-bit game
• Example 10 -- Writing a loader

---

#include <stdio.h>
#include <windows.h>

void __stdcall DisplayMessage(char *strMessage, int intDurationInSeconds)
{
    int intDisplayUntil = GetTickCount() + (intDurationInSeconds * 1000);
    int fcnDisplayMessage = 0x469380;

    __asm
    {
        push 0
        push intDisplayUntil
        mov  edx, 0
        mov  ecx, strMessage
        call fcnDisplayMessage
    }
}

BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
    switch(ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
        DisplayMessage("\x03Loading test plugin", 30);
        break;

    case DLL_PROCESS_DETACH:
        DisplayMessage("\x03Unloading test plugin", 30);
        break;
    }

    return TRUE;
}

Category: Assembly Examples