ulParam1 (ULONG)
This
parameter can contain the following flags
MCI_NOTIFY
Posts a notification message to the
window specified in the hwndCallback parameter of the data structure
identified by ulParam2 when the action indicated by this message
is completed.
MCI_WAIT
Does
not return control until the action indicated by this message is completed.
MCI_DGV_FREQUENCY
Sets
the frequency being sent to the device driver to the value in the ulFrequency
field of the MCI_DGV_TUNER_PARMS
structure. Overrides channel, region, and fine-tuning.
MCI_DGV_TV_CHANNEL
Sets the channel to the value in the ulTVChannel
field of the MCI_DGV_TUNER_PARMS
structure. Channel is used along with region and fine-tuning to calculate
the frequency.
MCI_DGV_REGION
Sets
the channel to the value in the pszRegion field of the MCI_DGV_TUNER_PARMS
structure. Region is used along with channel and fine-tuning to calculate
the frequency.
MCI_DGV_FINETUNE_PLUS
Indicates
that the value in the lFineTune field of the MCI_DGV_TUNER_PARMS
structure is positive. Fine-tuning is used along with region and channel
to calculate the frequency.
MCI_DGV_FINETUNE_MINUS
Indicates that the value in the lFineTune field
of the MCI_DGV_TUNER_PARMS structure
is negative. In other words, multiply the value in lFineTune by -1.
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