在Win7 64位系统下，调用CopyFile函数进行函数拷贝，如果希望拷贝文件到System32目录下，需要考虑程序是不是也是64位的，否则，程序会被重定向到Syswow64目录下，为了防止出现文件被重定向，就需要调用函数Wow64DisableWow64FsRedirection取消文件的重定向，并在完成指定功能后调用Wow64RevertWow64FsRedirection函数进行恢复。
MSDN中关于函数Wow64DisableWow64FsRedirection的声明： BOOL WINAPI Wow64DisableWow64FsRedirection( __out PVOID *OldValue ); http://msdn.microsoft.com/en-us/library/aa365743(v=vs.85).aspx MSDN中关于函数Wow64RevertWow64FsRedirection的声明： BOOL WINAPI Wow64RevertWow64FsRedirection( __in PVOID OldValue ); http://msdn.microsoft.com/en-us/library/aa365745(v=vs.85).aspx 关于函数的使用，摘一段msdn中的代码： #ifdef _WIN32_WINNT #undef _WIN32_WINNT #endif #define _WIN32_WINNT 0x0501 #ifdef NTDDI_VERSION #undef NTDDI_VERSION #endif #define NTDDI_VERSION 0x05010000 #include <Windows.h> void main() { HANDLE hFile = INVALID_HANDLE_VALUE; PVOID OldValue = NULL; // Disable redirection immediately prior to the native API // function call. if( Wow64DisableWow64FsRedirection(&OldValue) ) { // Any function calls in this block of code should be as concise // and as simple as possible to avoid unintended results. hFile = CreateFile(TEXT("C://Windows//System32//Notepad.exe"), GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); // Immediately re-enable redirection. Note that any resources // associated with OldValue are cleaned up by this call. if ( FALSE == Wow64RevertWow64FsRedirection(OldValue) ) { // Failure to re-enable redirection should be considered // a criticial failure and execution aborted. return; } } // The handle, if valid, now can be used as usual, and without // leaving redirection disabled. if( INVALID_HANDLE_VALUE != hFile ) { // Use the file handle } } 这段代码在win764位下调用没有问题，在xp 32位下面就会出现问题，即使加上判断系统是否为64位的代码也会导致程序出现如下图的错误： 解决方案是使用动态加载的方式对Wow64DisableWow64FsRedirection和Wow64RevertWow64FsRedirection进行加载，这样问题就解决了 PVOID OldValue = NULL; HINSTANCE hlibrary; typedef int (__stdcall * Wow64DisableWow64FsRedirection)(LPVOID); Wow64DisableWow64FsRedirection f_Wow64DisableWow64FsRedirection = NULL; typedef int (__stdcall * Wow64RevertWow64FsRedirection)(LPVOID); Wow64RevertWow64FsRedirection f_Wow64RevertWow64FsRedirection = NULL; hlibrary = LoadLibrary(L"Kernel32.dll"); f_Wow64DisableWow64FsRedirection = (Wow64DisableWow64FsRedirection) GetProcAddress(hlibrary,"Wow64DisableWow64FsRedirection"); if(!f_Wow64DisableWow64FsRedirection) { return 0; } f_Wow64RevertWow64FsRedirection = (Wow64RevertWow64FsRedirection) GetProcAddress(hlibrary,"Wow64RevertWow64FsRedirection"); if(!f_Wow64RevertWow64FsRedirection) { return 0; } f_Wow64DisableWow64FsRedirection (&OldValue); if(CopyFile(wNativePath,wSystemPath,FALSE)==0) { if ( FALSE == Wow64RevertWow64FsRedirection(OldValue) ) { return 0; } return 0; } f_Wow64RevertWow64FsRedirection (OldValue); FreeLibrary(hlibrary); 在使用这段代码前最好判断一下系统类型及位数！