Check the below method that uses Wow64DisableWow64FsRedirection to disable file system redirection so that a 32-bit application that is running under WOW64 can open the 64-bit version of Notepad.exe in %SystemRoot%\System32 instead of being redirected to the 32-bit version in %SystemRoot%\SysWOW64.
Code:
#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
}
}
For a complete list of detailed steps go to this link.
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