Need help with C++ string parasing and general help, help me please :)

Here are my few questions:
1. What are the equalent version of Goto, Exit Sub/function, and select case?

2. How can I pass the state of a checkbox to c++ dll function ( like chk.Value = 1)?

3. Can anyone explain whats going on in this code step by step please.
void _stdcall ReverseString( BSTR a )
{
int i, iLen;
BSTR b;
LPSTR pA, pB;

iLen = strlen( (LPCSTR)a );
b = SysAllocStringLen( NULL, iLen );

pA = (LPSTR)a;
pB = (LPSTR)b + iLen -1;

for ( i = 0; i < iLen; i++ )
*pB-- = *pA++;

pA = (LPSTR)a;
pB = (LPSTR)b;

for ( i = 0; i < iLen; i++ )
*pA++ = *pB++;

SysFreeString( b );
}

4. Whats the bug in CString. And what is meant by C style string?

Thanx in advance!

a select case (as known in vb) is a switch statment in C++

Code:

---


int nNumber;

switch (nNumber) {
    case 0: {
        // Do Whatever
        break;
    }
    case 1: {
        // Do Whatever
        break;
    } 
}

---

PHP Code:

---

void _stdcall ReverseString( BSTR a ) 
{ 
   int i, iLen; 
  BSTR b; 
  LPSTR pA, pB;   string pointers

  iLen = strlen( (LPCSTR)a );   how long is the a string
  // i'd add this line here if(iLen <2) return;  -- don't mess if only  1 or zero chars
  b = SysAllocStringLen( NULL, iLen );  create b memory for b - same length as a

   pA = (LPSTR)a;         pA points to start of a string
   pB = (LPSTR)b + iLen -1;   pB points to end of b (currently empty)

    for ( i = 0; i < iLen; i++ )  each char from a -> b backwards
      *pB-- = *pA++; 

   pA = (LPSTR)a;  reset pointer to the start of strings
   pB = (LPSTR)b; 

   for ( i = 0; i < iLen; i++ )  copy b to a char by char
      *pA++ = *pB++; 

    SysFreeString( b );  free memory allocated for b earlier

the 'a' string now is reversed.
} 


---

Exit Sub/Function in VB = return in C/C++.

if the return type of the function is void, then no return value needs to be specified, otherwise you need to return a value of the specified type.

:)

4. The bug in CString was a repeated-allocation memory leak. It has since been fixed ;) Incidentally, some RogueWave implementations of the standard library string class had the same type of bug.

CString is MFC
string is from the Standard C++ Library
A "C Style" string is merely an array with a NULL at the end of it to show where the string ends.

thanx for the help u guys are great!

There is another question

cpp file:
MYTESTDLLEXIM void _stdcall StrTest( char* FirstParam, char* SecondParam )
{
strcat(FirstParam,SecondParam);
}

def file:
StrTest @3


Giving me bad calling convention or something

I'm trying to make an string function.

Thanx in advance!