| Microsoft DirectX 8.1 (C++) |
The GetCurrentAngle method retrieves the number of available angles in the current angle block and the currently selected angle number.
Syntax
HRESULT GetCurrentAngle(
ULONG *pulAnglesAvailable,
ULONG *pulCurrentAngle
);
Parameters
pulAnglesAvailable
[out] Pointer to a variable of type ULONG that receives the number of available angles. There are up to nine angles in an angle block, numbered 1 through 9. If the value equals 1, then the DVD Navigator is not in an angle block.
pulCurrentAngle
[out] Pointer to a variable of type ULONG that receives the current angle number.
Return Values
Returns one of the following HRESULT values.
| Return code | Description |
| S_OK | Success. |
| E_POINTER | Invalid argument. |
| VFW_E_DVD_INVALIDDOMAIN | DVD Navigator is not initialized or not in a valid domain. |
Remarks
Note that angle and menu button indexes are 1-based, while audio and subpicture stream indexes are 0-based. When the DVD Navigator is about to enter an angle block, it sends the application an EC_DVD_ANGLES_AVAILABLE event notification with the lParam set to 1. Applications will typically call GetCurrentAngle and IDvdControl2::SelectAngle within their event handler for EC_DVD_ANGLES_AVAILABLE.
This method is demonstrated in the DVDSample application in CAngleDlg::MakeAngleList.
See Also