IltmmTargetFormat::HasCacheDialog

Summary

Queries whether the specified property dialog for the caching filter is available.

Syntax

#include "ltmm.h"

C Syntax

HRESULT IltmmTargetFormat_HasCacheDialog(pTargetFormat, Dialog, pHasDialog)

C++ Syntax

HRESULT HasCacheDialog(Dialog, pHasDialog)

IltmmTargetFormat * pTargetFormat;

pointer to an interface

long Dialog;

dialog to show

VARIANT_BOOL * pHasDialog;

pointer to a variable

Parameter Description
pTargetFormat Pointer to the IltmmTargetFormat interface that references the target format object.
Dialog Value that specifies which dialog to display. Must be one of the ltmmTargetFormat_Dlg Constants.
pHasDialog Pointer to a variable to be updated with a value that indicates whether the specified property dialog is available. Possible values are:
Value Meaning
VARIANT_TRUE The dialog is available.
VARIANT_FALSE The dialog is not available.

Returns

S_OK

The function was successful.

<> S_OK

An error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation.

Comments

Use the IltmmTargetFormat::get_UseFilterCache function to query whether the toolkit is caching filters. It returns the value that was set using the IltmmTargetFormat::put_UserFilterCache. Use the IltmmTargetFormat::put_UseFilterCache function to enable or disable caching for the target format. Use the IltmmTargetFormat::GetCacheObject function to retrieve the caching filter object. Use the IltmmTargetFormat::ShowCacheDialog function to display a specific property dialog for the caching filter. Use the IltmmTargetFormat::HasCacheDialog function to query whether the specified property dialog for the caching filter is available.

Required DLLs and Libraries

LTMM

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64

See Also

Elements:

IltmmTargetFormat::get_UseFilterCache, IltmmTargetFormat::put_UseFilterCache, IltmmTargetFormat::GetCacheObject IltmmTargetFormat::ShowCacheDialog, IltmmCapture::GetSubObject, IltmmConvert::GetSubObject

Topics:

Multimedia Function Group

Example

For a C example, refer to IltmmTargetFormat::CreateTargetFormats

For a C++ example, refer to IltmmTargetFormat::CreateTargetFormats

Help Version 22.0.2022.8.22
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LEADTOOLS Multimedia C API Help

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© 1991-2022 LEAD Technologies, Inc. All Rights Reserved.