mciSendCommand

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Windows Multimedia

mciSendCommand

The mciSendCommand function sends a command message to the specified MCI device.

MCIERROR mciSendCommand(
  MCIDEVICEID IDDevice,   
  UINT        uMsg,       
  DWORD       fdwCommand, 
  DWORD_PTR   dwParam     
);

Parameters

IDDevice

Device identifier of the MCI device that is to receive the command message. This parameter is not used with the MCI_OPEN command message.

uMsg

Command message. For a list, see Multimedia Commands.

fdwCommand

Flags for the command message.

dwParam

Pointer to a structure that contains parameters for the command message.

Return Values

Returns zero if successful or an error otherwise. The low-order word of the returned DWORD value contains the error return value. If the error is device-specific, the high-order word of the return value is the driver identifier; otherwise, the high-order word is zero. For a list of possible return values, see MCIERR Return Values.

To retrieve a text description of mciSendCommand return values, pass the return value to the mciGetErrorString function.

Remarks

Error values that are returned when a device is being opened are listed with the MCI_OPEN command message. In addition to the MCI_OPEN error return values, this function can return the values listed in MCIERR Return Values.

Use MCI_OPEN to obtain the device identifier specified by the IDDevice parameter.

Requirements

  Windows NT/2000/XP: Included in Windows NT 3.1 and later.
  Windows 95/98/Me: Included in Windows 95 and later.
  Header: Declared in Mmsystem.h; include Windows.h.
  Library: Use Winmm.lib.
  Unicode: Implemented as Unicode and ANSI versions on Windows NT/2000/XP.