如何在MessageBox上显示FARPROC内存地址

Question

So I'm trying to make a MessageBox pop up with the memory address of a FARPROC so I can see the value. I can't seem to do it though. I've tried some wacky stuff too.

This is my unworking example that I last tried.

MessageBox(NULL, (LPCSTR) (WCHAR) myFarproc, "Loader", NULL);

It just crashes the program, and

MessageBox(NULL, (LPCSTR) myFarproc, "Loader", NULL);

displays gibberish. Also of note is that the program calling this dll's code is in C#.

Answer 1

You can't just cast a pointer into a string and expect something legible, especially if you cast a random pointer into aa pointer to a C style string (which is what LPCSTR is).

What you need to do is to convert the numerical value of the pointer into a string using something like sprintf_s and display the resulting string.

For example (from memory, didn't compile it):

char buffer[9];   // Adjust size if you're on a 64-bit system
sprintf_s(buffer, "%x", (size_t)myFarProc);

This is assuming that you can use the C++ version of sprintf_s.

Answer 2

I think I did it. Am I doing this correctly?

size_t pAddy = (size_t) myFarproc;
stringstream ss;
char buff[10];
ss << itoa(pAddy,buff,16);
MessageBox(NULL, (LPCSTR) ss.str().c_str(), "Address", NULL);