DataToSend Property

A string of data to be sent to the remote host. Write-only property.

Syntax

udpportcontrol.DataToSend[=string]

Default Value

""

Remarks

Assigning a string to the DataToSend property makes the control send the string to the remote host. The Send method provides similar functionality.

Attempts to send the string assigned to DataToSend as a complete message. If system buffers are full, or the message cannot be delivered for any other reason, an error is fired, and no portion of the message is sent. This is different from TCP where portions of the messages can be sent. UDP sends either a complete message or nothing at all.

If you are sending data to the remote host faster than it can process it, or faster than the network's bandwidth allows, the outgoing queue might fill up. When this happens, DataToSend fails with error 25036: "[10035] Operation would block" (WSAEWOULDBLOCK). You can trap this error, and then try to send the data again.

Example (Send Data)

UDPPortControl.LocalPort = 8765 
UDPPortControl.RemotePort = 8765 
UDPPortControl.RemoteHost = "HostNameOrIPAddress"
UDPPortControl.Active = True
UDPPortControl.DataToSend = "Hello!"

To read or write binary data to the property, a Variant (Byte Array) version is provided in .DataToSendB.

This property is write-only and not available at design time.

Data Type

Binary String