Define VI Prototype Dialog Box

Requires: Professional System

From the Source Files page of the Shared Library Properties dialog box, select a VI in the Exported VIs listbox and click the Define Prototype button to display this dialog box. The dialog box also displays automatically when you move a VI to the Exported VIs listbox.

Use this dialog box to define the parameters of an exported VI for a shared library.

This dialog box includes the following components:

• Function Name—Defines the name of the function in the shared library.
• Standard Calling Conventions—Sets the function prototype to use standard calling conventions.
• C Calling Conventions—Sets the function prototype to use C calling conventions. This radio button is enabled by default.
• Parameters—Lists the current parameters for the VI prototype. You can configure the Parameters list using the following buttons along the right side of the Parameters list. return value is a required parameter that you cannot delete.

  Note  If you want to include a control or indicator as a parameter, you must use the connector pane of the VI to configure it as an input or output.

  • Add—Adds a parameter from the controls and indicators of the VI. If you did not set up the connector pane for the VI, the Add button is dimmed.
  • Delete the selected parameter—Deletes the selected parameter from the Parameters list.
  • Move the selected parameter up one—Moves the selected parameter up one level in the Parameters list, which modifies the order of the parameters in the function prototype.
  • Move the selected parameter down one—Moves the selected parameter down one level in the Parameters list, which modifies the order of the parameters in the function prototype.
• Current Parameter—Allows you to configure the settings for the selected parameter. Available settings differ depending on the type of parameter. LabVIEW provides only valid settings for each parameter.
  • Name—Specifies the name of the selected parameter.
  • Param Type—Specifies whether the selected parameter type is input, output, or input/output.
  • VI Input—Associates an input of the VI with the current parameter.
  • VI Output—Associates an output of the VI with the current parameter.
  • Pass By—Specifies the method the parameter uses to send data.
  • Length Input—Specifies the length of the input either as a specific value, the number of items in the array, or as another parameter in the Parameters listbox.
  • Length Output—Specifies the length of the output either as a specific value, the number of items in the array, or as another parameter in the Parameters listbox.
• Function Prototype—Displays the code generated using the current settings for the function prototype. You cannot edit the code directly in this field.