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mciSendCommand The mciSendCommand function sends a command message to the specified MCI device.
VB4-32,5,6
Declare Function mciSendCommand Lib "winmm.dll" Alias "mciSendCommandA" (ByVal wDeviceID As Long, ByVal uMessage As Long, ByVal dwParam1 As Long, ByRef dwParam2 As Any) As Long |
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Operating Systems Supported |
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Requires Windows NT 3.1 or later; Requires Windows 95 or later |
- 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 information about command messages, see Command Messages.
- fdwCommand
Flags for the command message.
- dwParam
Address of a structure that contains parameters for the command message. |
Returns zero if successful or an error otherwise. The low-order word of the returned doubleword 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 Constants: MCIERR Return Values.
To retrieve a text description of mciSendCommand return values, pass the return value to the mciGetErrorString function. |
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