Visual Basic: MSComm Control

Visual Studio 6.0

DSRHolding Property

See Also   Example   Applies To

Determines the state of the Data Set Ready (DSR) line. Typically, the Data Set Ready signal is sent by a modem to its attached computer to indicate that it is ready to operate. This property is not available at design time and is read-only at run time.



The object placeholder represents an object expression that evaluates to an object in the Applies To list.

The DSRHolding property returns the following values:

Value Description
True Data Set Ready line high
False Data Set Ready line low


This property is useful when writing a Data Set Ready/Data Terminal Ready handshaking routine for a Data Terminal Equipment (DTE) machine.

Data Type