LowLevel Windows API Keyboard Hook

//**************************************
// Name: LowLevel Windows API Keyboard Hook
// Description:Sets a global keyboard hook in the current process low level using the Windows API
// By: aaron blair
//
//This code is copyrighted and has// limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=11920&lngWId=3//for details.//**************************************

#include 
#include 
#include 
// function declaration.
LRESULT CALLBACK LowLevelKeyboardProc( int nCode, WPARAM wParam, LPARAM lParam );
int main()
{
 // Retrieve the applications instance
HINSTANCE appInstance = GetModuleHandle(NULL);
 // Set a global Windows Hook to capture keystrokes.
 SetWindowsHookEx( WH_KEYBOARD_LL, LowLevelKeyboardProc, appInstance, 0 );
MSG msg;
while(GetMessage(&msg, NULL, 0, 0) > 0)
{
  TranslateMessage(&msg);
  DispatchMessage(&msg);
}
 
return 0;
}
LRESULT CALLBACK LowLevelKeyboardProc( int nCode, WPARAM wParam, LPARAM lParam )
{
 // Declare our pointer to the KBDLLHOOKSTRUCT
 KBDLLHOOKSTRUCT *pKeyBoard = (KBDLLHOOKSTRUCT *)lParam;
 switch( wParam )
 {
 case WM_KEYUP: // When the key has been pressed and released
  {
   switch( pKeyBoard->vkCode ) // Check to see what key has been pushed
   {
   case VK_RETURN: // The return/enter key has been pressed
    DWORD timestamp = pKeyBoard->time; // This shows our timestamp when the key was pushed.
    printf("Enter Key Pressed %u", timestamp ); // Show us when the key has been pushed
   break;
   }
  }
 default:
  return CallNextHookEx( NULL, nCode, wParam, lParam );
 }
 return 0;