asyncinet.h

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#ifndef ASYNC_INET
#define ASYNC_INET
 
 
enum ASYNC_EVENT
{
    ASYNCINET_DATA,           // wParam is the Data retrieved from the internet, lParam is the length of Data
 
    ASYNCINET_COMPLETE,       // wParam and lParam are not used.
                              // when receiving this, AsyncInet will be free soon and should not used anymore
 
    ASYNCINET_CANCELLED,      // wParam and lParam are not used.
                              // when receiving this, AsyncInet will be free soon and should not used anymore
 
    ASYNCINET_ERROR           // wParam is not used. lParam specify the error code (if there is one).
                              // when receiving this, AsyncInet will be free soon and should not used anymore
};
 
typedef struct __AsyncInet ASYNCINET, * pASYNCINET;
 
typedef int
(*ASYNCINET_CALLBACK)(
    pASYNCINET AsyncInet,
    ASYNC_EVENT Event,
    WPARAM wParam,
    LPARAM lParam,
    VOID* Extension
    );
 
typedef struct __AsyncInet
{
    HINTERNET hInternet;
    HINTERNET hInetFile;
 
    HANDLE hEventHandleCreated;
 
    UINT ReferenceCnt;
    CRITICAL_SECTION CriticalSection;
    HANDLE hEventHandleClose;
 
    BOOL bIsOpenUrlComplete;
 
    BOOL bCancelled;
 
    BYTE ReadBuffer[4096];
    DWORD BytesRead;
 
    ASYNCINET_CALLBACK Callback;
    VOID* Extension;
} ASYNCINET, * pASYNCINET;
 
pASYNCINET AsyncInetDownload(LPCWSTR lpszAgent,
    DWORD   dwAccessType,
    LPCWSTR lpszProxy,
    LPCWSTR lpszProxyBypass,
    LPCWSTR lpszUrl,
    BOOL bAllowCache,
    ASYNCINET_CALLBACK Callback,
    VOID* Extension
    );
 
BOOL AsyncInetCancel(pASYNCINET AsyncInet);
 
VOID AsyncInetRelease(pASYNCINET AsyncInet);
 
#endif