C / C++ / MFC

union AllTypes
{
  signed short    ssData;
  unsigned short  usData;
  signed long     slData;
  unsigned long   ulData;
  float           flData;
  double          dblData;
  unsigned char   ucData[8];
};

void doPrint(unsigned char* pData, size_t tCount)
{
  printf("data: ");
  for(size_t tFoo = 0; tFoo < tCount; ++tFoo)
  {
    printf("%d ", pData[tFoo]);
    /* to show the hex values of the byte use:
       printf("%02x ", pData[tFoo]);*/
  }  
  printf("\n");
}

/* I always use 2 functions to preform a swap
  one function for 2 bytes (short), and one to swap 4 bytes (long)*/

void doShortSwap(unsigned short* pData)
{
  unsigned short usTemp = 0xFF & *pData;
  
  usTemp <<= 8;
  *pData >>= 8;
  *pData |= usTemp;
}

void doLongSwap(unsigned long* pData)
{
  unsigned long ulTemp = 0xFFFF & *pData;

  doShortSwap((unsigned short*)&ulTemp);
  ulTemp <<= 16;

  *pData >>= 16;
  doShortSwap((unsigned short*)pData);

  *pData |= ulTemp;
}

<code>int main()
{
  AllTypes var1;
  
  var1.ulData = 12345687;
  doPrint(var1.ucData, sizeof(AllTypes));

  doLongSwap(&var1.ulData);
  doPrint(var1.ucData, sizeof(AllTypes));

  return 0;
}</code>

 HANDLE hRemoteThread = CreateRemoteThread(<br />
hTargetProcess, NULL, 0, LoadLibraryA,<br />
pRemotelyAllocatedStringContainigPathToTheDll, 0, &dwWriteBytes);

 <br />
HANDLE hRemoteThread = CreateRemoteThread(<br />
hTargetProcess, NULL, 0, 0x7c801d77,<br />
pRemotelyAllocatedStringContainigPathToTheDll, 0, &dwWriteBytes);<br />

DWORD __stdcall RemoteThreadProc(LPVOID lParam)<br />
{<br />
  __asm<br />
  {<br />
    push 0<br />
    call DWORD PTR LoadLibrary<br />
  }<br />
}

push 0<br />
call DWORD PTR LoadLibrary<br />
retn 0

deng0jun wrote:

LoadLibraryA(NULL); //crash!!! Why crash???

DavidCrow wrote:

Why would you expect it not to crash?

sahanaskin wrote:

Thanks very much for your reply. I'm researching tinyxml now.

Raghavendra Pise wrote:

Note:Here recvbuf works for singel byte not for doublebyte charcters.