IDvdInfo2::GetCurrentButton method (strmif.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The GetCurrentButton method retrieves the number of available buttons and the number of the currently selected button.
Syntax
HRESULT GetCurrentButton(
[out] ULONG *pulButtonsAvailable,
[out] ULONG *pulCurrentButton
);
Parameters
[out] pulButtonsAvailable
Receives the number of buttons available.
[out] pulCurrentButton
Receives the number (from 1 through 36) of the currently selected button.
Return value
Returns one of the following HRESULT values.
| Return code | Description |
|---|---|
|
Success. |
|
One of the pointer arguments is not valid. |
Remarks
If buttons are not present, both pulButtonsAvailable and pulCurrentButton are set to zero.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows XP [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |