# Dynamic API Resolution

Create declerations for the functions you are going to call.

```c
HANDLE (WINAPI *myHeapCreate)( DWORD flOptions, SIZE_T dwInitialSize, SIZE_T dwMaximumSize );
LPVOID (WINAPI *myHeapAlloc)( HANDLE hHeap, DWORD  dwFlags, SIZE_T dwBytes);
```

Resolve them,

```c
HMODULE kernel32dll             = GetModuleHandleA("kernel32.dll");
myHeapCreate                    = GetProcAddress(kernel32dll, "HeapCreate");
myHeapAlloc                     = GetProcAddress(kernel32dll, "HeapAlloc");
```

And now you call them,

```c
HANDLE hHeap = myHeapCreate(HEAP_CREATE_ENABLE_EXECUTE, 0, 0);
void* hmem = myHeapAlloc(hHeap, 0, 0x1000);
```

You can ideally encode hardcode strings like "kernel32.dll", "HeapCreate" etc. 

* <https://github.com/morph3/myldr/blob/main/templates/default_template.c>

Dynamically resolving hashed-NTAPI Calls

* <https://mez0.cc/posts/dynamic-api-fnv/>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://notes.morph3.blog/malware-development/dynamic-api-resolution.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.