MM_MCISIGNAL message

  • Article

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.

Requirements

Requirement Value
Minimum supported client
 Windows 2000 Professional [desktop apps only]
Minimum supported server
 Windows 2000 Server [desktop apps only]
Header
Mmsystem.h (include Windows.h)

See also

MCI

MCI Messages

signal