Loading and Calling DLLs Via C (Indirect)

From Hak5

This tutorial explains indirectly loading a DLL via C++ NON-MFC.

Code:

#include <windows.h>
int main()
{
  typedef int (*MYPROC)(LPTSTR,LPTSTR); 
  HMODULE mydll;
  MYPROC sayit; 
  mydll = LoadLibrary("FUN.DLL");
  sayit = (MYPROC) GetProcAddress(mydll,"say"); 
  (sayit) ("This is a Custom Message","Customiize yur world DUDE");
}

Ok so lets dig through this one not even hard at all I promise

typedef int (*MYPROC)(LPTSTR,LPTSTR); 

creates an int type called MYPROC but has 2 LPTSTR fields required because the function inside the dll also has 2 LPTSTRs

HMODULE mydll;
MYPROC sayit; 

Creates a HMODULE var called mydll and creates a MYPROC varable called sayit

mydll = LoadLibrary("FUN.DLL");

Loads your DLL

sayit = (MYPROC) GetProcAddress(mydll,"say"); 

Search the DLL for the functions "say" if found sayit becomes say and is required by 2 string variables

(sayit) ("This is a Custom Message","Customiize yur world DUDE");

This basically says (functions)(string1,string2);