External Interfaces/API

Example: Using Visual Basic and the MATLAB DDE Server

This example shows a Visual Basic form that contains two text edit controls, TextInput and TextOutput. This code is the TextInput_KeyPress method.

Sub TextInput_KeyPress(KeyAscii As Integer)
rem If the user presses the return key
rem in the TextInput control.
If KeyAscii = vbKeyReturn then

rem Initiate the conversation between the TextInput
rem control and MATLAB under the Engine topic.
rem Set the item to EngEvalString.
                     TextInput.LinkMode = vbLinkNone
                     TextInput.LinkTopic = "MATLAB|Engine"
                     TextInput.LinkItem = "EngEvalString"
                     TextInput.LinkMode = vbLinkManual

rem Get the current string in the TextInput control.
rem This text is the command string to send to MATLAB.
                     szCommand = TextInput.Text

rem Perform DDE Execute with the command string.
                     TextInput.LinkExecute szCommand
                     TextInput.LinkMode = vbLinkNone

rem Initiate the conversation between the TextOutput
rem control and MATLAB under the Engine topic.
rem Set the item to EngStringResult.
                     TextOutput.LinkMode = vbLinkNone
                     TextOutput.LinkTopic = "MATLAB|Engine"
                     TextOutput.LinkItem = "EngStringResult"
                     TextOutput.LinkMode = vbLinkManual

rem Request the string result of the previous EngEvalString
rem command. The string ends up in the text field of the
rem control TextOutput.text.
                     TextOutput.LinkRequest
                     TextOutput.LinkMode = vbLinkNone

End If
End Sub

The DDE Name Hierarchy

Using MATLAB As a Client