Added module pinning capability #4
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https://learn.microsoft.com/en-us/windows/win32/api/libloaderapi/nf-libloaderapi-getmodulehandleexw
By using GetModuleHandleExW with GET_MODULE_HANDLE_EX_FLAG_PIN parameter, we prevent any unexpected unload on our module.
This can prevent malware from unloading foreign modules within its own address space.
Also, on estr3llas@b5fdc2a there is a little improvement on the function's implementation, so we do not have to assign c1 and c2 a new value every iteration.