关于URLDownloadToFile函数的使用

[master_hm]

我在使用URLDownloadToFile函数时候，为什么EVC编译器会说URLDownloadToFile函数没有定义，我已经包含了头文件？

[小李匪盗]

头文件怎么定义的？

[master_hm]

定义在urlmon.h文件中，定义如下：
STDAPI URLOpenStreamA(LPUNKNOWN,LPCSTR,DWORD,LPBINDSTATUSCALLBACK);
STDAPI URLOpenStreamW(LPUNKNOWN,LPCWSTR,DWORD,LPBINDSTATUSCALLBACK);
STDAPI URLOpenPullStreamA(LPUNKNOWN,LPCSTR,DWORD,LPBINDSTATUSCALLBACK);
STDAPI URLOpenPullStreamW(LPUNKNOWN,LPCWSTR,DWORD,LPBINDSTATUSCALLBACK);
STDAPI URLDownloadToFileA(LPUNKNOWN,LPCSTR,LPCSTR,DWORD,LPBINDSTATUSCALLBACK);
STDAPI URLDownloadToFileW(LPUNKNOWN,LPCWSTR,LPCWSTR,DWORD,LPBINDSTATUSCALLBACK);
STDAPI URLDownloadToCacheFileA(LPUNKNOWN,LPCSTR,LPSTR,DWORD,DWORD,LPBINDSTATUSCALLBACK);
STDAPI URLDownloadToCacheFileW(LPUNKNOWN,LPCWSTR,LPWSTR,DWORD,DWORD,LPBINDSTATUSCALLBACK);
STDAPI URLOpenBlockingStreamA(LPUNKNOWN,LPCSTR,LPSTREAM*,DWORD,LPBINDSTATUSCALLBACK);
STDAPI URLOpenBlockingStreamW(LPUNKNOWN,LPCWSTR,LPSTREAM*,DWORD,LPBINDSTATUSCALLBACK);

#ifdef UNICODE
#define URLOpenStream URLOpenStreamW
#define URLOpenPullStream URLOpenPullStreamW
#define URLDownloadToFile URLDownloadToFileW
#define URLDownloadToCacheFile URLDownloadToCacheFileW
#define URLOpenBlockingStream URLOpenBlockingStreamW
#else
#define URLOpenStream URLOpenStreamA
#define URLOpenPullStream URLOpenPullStreamA
#define URLDownloadToFile URLDownloadToFileA
#define URLDownloadToCacheFile URLDownloadToCacheFileA
#define URLOpenBlockingStream URLOpenBlockingStreamA
#endif // !UNICODE


STDAPI HlinkGoBack(IUnknown *pUnk);
STDAPI HlinkGoForward(IUnknown *pUnk);
STDAPI HlinkNavigateString(IUnknown *pUnk, LPCWSTR szTarget);
STDAPI HlinkNavigateMoniker(IUnknown *pUnk, IMoniker *pmkTarget);

#ifndef _URLMON_NO_ASYNC_PLUGABLE_PROTOCOLS_

[JamesXing]

是不是没有添加对应的LIB文件？

[JamesXing]

Urlmon.lib

[master_hm]

加了

[wei555zeng]

这位大哥，解决了没？
我也遇到一摸一样的问题。怎么办呢

[91program]

WinCE4.2以后是支持它的

OS Versions: Windows CE .NET 4.0 and later.
Header: Urlmon.h, Urlmon.idl.
Link Library: Urlmon.lib.