96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
|
/*++
|
||
|
|
|
||
|
|
Copyright (c) 2001-2002 Microsoft Corporation
|
||
|
|
|
||
|
|
Module Name:
|
||
|
|
|
||
|
|
RemoveDDEFlagFromShellExecuteEx.cpp
|
||
|
|
|
||
|
|
Abstract:
|
||
|
|
|
||
|
|
Some applications call ShellExecute which in turn calls ShellExecuteEx.
|
||
|
|
One of the flags in the SHELLEXECUTEINFO structure is 'SEE_MASK_FLAG_DDEWAIT'.
|
||
|
|
This flag gets set by ShellExecuteEx as a default whenever ShellExecute is
|
||
|
|
called.
|
||
|
|
|
||
|
|
Here is the description for the flag:
|
||
|
|
|
||
|
|
'Wait for the DDE conversation to terminate before returning
|
||
|
|
(if the ShellExecuteEx function causes a DDE conversation to start).
|
||
|
|
|
||
|
|
The SEE_MASK_FLAG_DDEWAIT flag must be specified if the thread calling
|
||
|
|
ShellExecuteEx does not have a message loop or if the thread or process
|
||
|
|
will terminate soon after ShellExecuteEx returns. Under such conditions,
|
||
|
|
the calling thread will not be available to complete the DDE conversation,
|
||
|
|
so it is important that ShellExecuteEx complete the conversation before
|
||
|
|
returning control to the caller. Failure to complete the conversation can
|
||
|
|
result in an unsuccessful launch of the document.
|
||
|
|
|
||
|
|
If the calling thread has a message loop and will exist for some time
|
||
|
|
after the call to ShellExecuteEx returns, the SEE_MASK_FLAG_DDEWAIT
|
||
|
|
flag is optional. If the flag is omitted, the calling thread's message
|
||
|
|
pump will be used to complete the DDE conversation. The calling application
|
||
|
|
regains control sooner, since the DDE conversation can be completed in the background.'
|
||
|
|
|
||
|
|
When the flag gets passed, it can sometimes cause synchronzation problems.
|
||
|
|
An example is Photo Express Platinum 2000. It attempts to launch Internet Explorer,
|
||
|
|
but IE wreaks havoc on the app that made the call.
|
||
|
|
|
||
|
|
This shim simply removes this flag from the ShellExecuteEx call.
|
||
|
|
|
||
|
|
Notes:
|
||
|
|
|
||
|
|
This is a general purpose shim.
|
||
|
|
|
||
|
|
History:
|
||
|
|
|
||
|
|
04/16/2001 rparsons Created
|
||
|
|
03/07/2002 mnikkel Added check for Null lpExecInfo
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
#include "precomp.h"
|
||
|
|
|
||
|
|
IMPLEMENT_SHIM_BEGIN(RemoveDDEFlagFromShellExecuteEx)
|
||
|
|
#include "ShimHookMacro.h"
|
||
|
|
|
||
|
|
APIHOOK_ENUM_BEGIN
|
||
|
|
APIHOOK_ENUM_ENTRY(ShellExecuteExW)
|
||
|
|
APIHOOK_ENUM_END
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Hook the call to ShellExecuteExW and remove the flag.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
BOOL
|
||
|
|
APIHOOK(ShellExecuteExW)(
|
||
|
|
LPSHELLEXECUTEINFO lpExecInfo
|
||
|
|
)
|
||
|
|
{
|
||
|
|
if (lpExecInfo)
|
||
|
|
lpExecInfo->fMask = lpExecInfo->fMask & ~SEE_MASK_FLAG_DDEWAIT;
|
||
|
|
|
||
|
|
LOGN( eDbgLevelInfo, "Removed SEE_MASK_FLAG_DDEWAIT from ShellExecuteExW");
|
||
|
|
|
||
|
|
return ORIGINAL_API(ShellExecuteExW)(lpExecInfo);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Register hooked functions
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
HOOK_BEGIN
|
||
|
|
|
||
|
|
APIHOOK_ENTRY(SHELL32.DLL, ShellExecuteExW)
|
||
|
|
|
||
|
|
HOOK_END
|
||
|
|
|
||
|
|
|
||
|
|
IMPLEMENT_SHIM_END
|
||
|
|
|