MM_MCISIGNAL

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The MM_MCISIGNAL message is sent to a window to notify an application that an MCI device has reached a position defined in a previous signal (MCI_SIGNAL) command.

MM_MCISIGNAL

wParam = (WPARAM) wID
lParam = (LONG) lUserParm

Parameters
wID

Identifier of the device initiating the signal message.

lUserParm

Value passed in the dwUserParm member of the MCI_DGV_SIGNAL_PARAMS structure when the signal command has defined this callback function. Alternatively, it might contain the position value.