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IDirectInputEffect::Start Method

  • Artículo

Begins playing an effect. If the effect is already playing, it is restarted from the beginning. If the effect has not been downloaded or has been modified since its last download, it is downloaded before being started. This default behavior can be suppressed by passing the DIES_NODOWNLOAD flag.

Syntax

HRESULT Start(
         DWORD dwIterations,
         DWORD dwFlags
)

Parameters

  • dwIterations
    Number of times to play the effect in sequence. The envelope is re-articulated with each iteration. To play the effect exactly once, pass 1. To play the effect repeatedly until explicitly stopped, pass INFINITE. To play the effect until explicitly stopped without re-articulating the envelope, modify the effect parameters with the IDirectInputEffect::SetParameters method, and change the dwDuration member to INFINITE.
  • dwFlags
    Flags that describe how the effect should be played by the device. The value can be 0 or one or more of the following values:
    • DIES_SOLO
      All other effects on the device should be stopped before the specified effect is played. If this flag is omitted, the effect is mixed with existing effects already started on the device.
    • DIES_NODOWNLOAD
      Do not automatically download the effect.

Return Value

If the method succeeds, the return value is DI_OK. If the method fails, the return value can be one of the following error values: DIERR_INCOMPLETEEFFECT, DIERR_INVALIDPARAM, DIERR_NOTEXCLUSIVEACQUIRED, DIERR_NOTINITIALIZED, DIERR_UNSUPPORTED.

Remarks

The device must be acquired at the exclusive cooperative level for this method to succeed.

Not all devices support multiple iterations.

Requirements

Header: Declared in dinput.h.