how does DllCall work?

[Richard Robertson]

i know how to call dlls explicitly but how do you call the functions dynamically?

i can create a static function prototype but how would you do it at runtime like autoit's dllcall function?

[Jon]

The concept is fairly easy once you know how function calls happen:

1. Get the address of the function with GetProcAddress()

2. parameters are pushed onto the stack

3. you call the function

4. you clean up the stack (or not depending on function calling type)

You have to use assembly and the devil is in the detail.

[Richard Robertson]

assembly? i was hoping i might be able to do it

oh well, just wondering