isdebuggerpresent.cpp

此为本书的配套光盘.本书结合实例

/*--------------------------------------------------------------
   IsDebuggerPresent.cpp -- 检测用户模式调试器（如OllyDbg）
                           (c) www.pediy.com code by 段钢, 2003.11
  --------------------------------------------------------------*/
#include <windows.h>
BOOL IsInDebugger();
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,PSTR szCmdLine, int iCmdShow)
{	 
      
	if( IsInDebugger() )
		MessageBox(NULL,TEXT ("u are debugging me !"),TEXT ("OK"),MB_ICONEXCLAMATION);
	else
       	MessageBox(NULL,TEXT ("not debugged!"),TEXT ("OK"),MB_ICONEXCLAMATION);
	return 0;
}

//////////////////////////////////////////////////////////////////////

BOOL IsInDebugger()
{
  HINSTANCE hInst = LoadLibrary("kernel32.dll");

  if (hInst != NULL)
  {
   FARPROC pIsDebuggerPresent = GetProcAddress(hInst, "IsDebuggerPresent");

    if (pIsDebuggerPresent != NULL)
	return pIsDebuggerPresent();
  }
  return FALSE;

}