Icons
To have your own icons used on a menu button, use any 2D art package which creates "*.xpm" files on unix or "*.bmp" files on NT. These should be moved to the driver directory where they will be loaded at each runtime.
A third party application developer can reference his own ".bmp" icon image files ("*.xpm" on Unix) in his GUI form definitions. The user only specifies the file name. VX will search for the icon file in the default installation directories and directories specified in the "vxpaths" configuration file (see File/Search Path...).
The icon image files should use 8 bit color. They will be displayed with the size defined in the file. In VX, the larger icons used on the "side bars" are 32x32 pixels. GUI forms generally use either 32x32 or 24x24, but sometimes use other sizes, depending on the situation.