FUNCTION

Specify the width of a window. Usually, you won't give a pixel value here but instead use one of the following magic macros:

MUIV_Window_Width_Default:
calculated from objects default sizes.

MUIV_Window_Width_MinMax(0..100):
somewhere between the minimum width (0) and the maximum width (100) of your window.

MUIV_Window_Width_Visible(1..100):
percentage of the screens visible width.

MUIV_Window_Width_Screen(1..100):
percentage of the screens total width.

MUIV_Window_Width_Scaled:
width will be adjusted so that width : height == minimum width : minimum height. Note that a windows width and height may not both be scaled.

Default for this tag is MUIV_Window_Width_Default.

As long as your window has a window id (MUIA_Window_ID), choosing a size is not that important. MUI will always remember a windows last position and size and these values will simply override your settings. Positioning and sizing should be completely under user control, a programmer doesn't need to worry about it.