GetMsgCallbackAttribute

int GetMsgCallbackAttribute (int panelHandle, int messageNumber, int callbackAttribute, int *attributeValue);

Purpose

This function gets an attribute of the callback mechanism linked to the specified message number and panel.

Parameters

Input
Name Type Description
panelHandle integer The handle of the panel for which a message–callback is installed.
messageNumber integer The number of the message for whose callback mechanism you wish to get an attribute.
callbackAttribute integer The callback attribute value to obtain.

In the function panel, when you click the control or press <Enter>, <Spacebar>, or <Ctrl-down arrow>, a dialog box appears containing a hierarchical list of the available attributes. Attributes whose values cannot be obtained are dimmed. Help text is shown for each attribute. To select an attribute, double-click it or select it and then press <Enter>.

If the attribute shown in this ring control has named constants as valid values, you can open a list of them by moving to the Attribute Value control and pressing <Enter>. The Attribute Values dialog box displays the values and value help for the constants.
Output
Name Type Description
attributeValue integer * The value of the specified callback attribute.

If the attribute shown in this control has named constants as valid values, you can open a list of them by pressing <Enter>. The Attribute Values dialog box displays the values and value help for the constants.

Return Value

Name Type Description
status integer The status code that the function returns.

0 indicates success.

A negative value indicates an error.

This function may return a Programmer's Toolbox or UI Library error code. Call GetGeneralErrorString to obtain a text description of the error.