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How to call win32 API from asm?

 
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mindoff
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PostPosted: Mon Aug 07, 2017 6:42 am    Post subject: How to call win32 API from asm? Reply with quote

I try to call win32 API,lets say 000007FEFD209AC0,which is LoadLibraryExW.
Next time the address may change.

So is there a way to find those win32 API address automaticly and correctly each time by asm?

The original program does not call those win32 API,I want to call them by asm.
How can I do this correct?
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Dark Byte
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Location: The netherlands

PostPosted: Mon Aug 07, 2017 7:46 am    Post subject: Reply with quote

Instead of giving as address 000007FEFD209AC0, give as address LoadLibraryExW. Cheat Engine will figure out the address for you.
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Do not ask me about online cheats. I don't know any and wont help finding them.
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mindoff
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PostPosted: Mon Aug 07, 2017 9:19 am    Post subject: Reply with quote

How to figure out this address manually,not by cheat engine?

Need to know why and how behind CE does.
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Redouane
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Joined: 05 Sep 2013
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Location: Algeria

PostPosted: Wed Aug 09, 2017 7:27 pm    Post subject: Reply with quote

mindoff wrote:
How to figure out this address manually,not by cheat engine?

Need to know why and how behind CE does.


Call GetProcAddress (not sure if that's what CE does, but it should be):

Code:
FARPROC WINAPI GetProcAddress(
  _In_ HMODULE hModule,
  _In_ LPCSTR  lpProcName
);


the first parameter is a handle to the DLL module, the second is a string : the function name.

Return value : If the function succeeds, the return value is the address of the exported function or variable.

You can find many examples of its usage online.
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