使用纯 Win32 API 编程实现Winpcap 封包捕获的第一个例子_wincap api

先上代码；

/*------------------------------------------------------------
   win32, Winpcap, by bobo, 2018-09-09
  ------------------------------------------------------------*/
 
//#include <windows.h>
#include <pcap.h>
 
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);
 
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    PSTR szCmdLine, int iCmdShow)
{
     static TCHAR szAppName[] = TEXT ("HelloWin") ;
     HWND         hwnd ;
     MSG          msg ;
     WNDCLASS     wndclass ;
 
     wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
     wndclass.lpfnWndProc   = WndProc ;
     wndclass.cbClsExtra    = 0 ;
     wndclass.cbWndExtra    = 0 ;
     wndclass.hInstance     = hInstance ;
     wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
     wndclass.hbrBackground = (H