IAMVfwCompressDialogs::ShowDialog

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Microsoft DirectShow 9.0

IAMVfwCompressDialogs::ShowDialog

The ShowDialog method displays the specified dialog box.

Syntax

  HRESULT ShowDialog(
  int iDialog,
  HWND hwnd
);

Parameters

iDialog

[in] Dialog box to display. This is a member of the VfwCompressDialogs enumeration.

hwnd

[in] Handle of the dialog box's parent window.

Return Values

Returns an HRESULT value that depends on the implementation of the interface.

Remarks

This method returns an error when asked to display a dialog box while the driver is streaming or displaying another dialog box. While the driver displays the dialog box you can't stream (pause or run) the filter.

IAMVfwCompressDialogs::ShowDialog calls the Video for Windows video compression manager (VCM) functions ICConfigure, ICAbout, ICQueryConfigure, and ICQueryAbout to display the appropriate dialog box or determine if one exists.

The VfwCompressDialog_QueryConfig and VfwCompressDialog_QueryAbout members of the VfwCompressDialogs enumeration tell you whether or not the configure dialog or about dialog is available. If passed one of these flags, the filter will return S_OK if the dialog exists, and S_FALSE if it does not. If a dialog is available, you call ShowDialog with the value VfwCompressDialog_Config or VfwCompressDialog_About to bring up the dialog.

Requirements

Header: Declared in Strmif.h; include Dshow.h.

Library: Use Strmiids.lib.

See Also