The features described in this topic are obsolete
and should not be used in new IDL code.

XLoadCT Functionality Using Visual Basic

The VBLoadCT example duplicates the XLOADCT functionality using a VB interface. The VBLoadCT.pro source code (located in the examples\docs\ActiveX\VBLoadCt directory of the IDL installation directory) is a functional duplicate of XLOADCT with procedure calls replacing the xloadct_event procedure as well as IDL widgets being replaced by VB controls. See the following figure for more information.

In addition, this example extends XLOADCT by adding the following features:

Options menu by clicking the right mouse button on a color;

Use of IDL syntax to create separate functions for red, blue and green;

Ability to save user created color tables.

This example illustrates the following concepts:

Modifying existing IDL library code for use with the IDLDrawWidget;

IDL to Visual Basic color table conversion

Figure 7-7: VBLoadCT Example