How do you set the Visual Type from within AVS?

Q: There are some public domain modules from the International AVS Centre. One makes use of the following statement:

 LUI_Initialize("AVS display window", NULL);

I notice that this leads to a subsequent call:

 window = LUI_CreateWindowAt(LUI_RootWindow, x, y ,width, height);

which generates an 8-bit pseudocolor window.

This is because the default visual on OpenWindows 3.0 is an 8-bit PseudoColor, even through TrueColor and DirectColor visuals are available.

Q: Would it be possible for a hint on how to generate a TrueColor window with the above calls, so that my images are not always dithered ?

A: This is a LUI function to call BEFORE calling LUI_Initialize

LUI_SetDefaultVisualType(char *visualtype);

where visualtype is "PseudoColor", "DirectColor", "TrueColor", or "VisualID"-something

This corresponds to the .avsrc option VisualType. See the .avsrc options for more information. Please note that LUI is unsupported.