VG_WIND

Syntax	VG_WIND x1, x2, y1, y2
Location	BGI

This command defines a rectangular area of the screen. Only text printed inside this window with VG_PRINT (it’s not a window in SuperBASIC terms) will be visible:

  0                         511
0 +-------------------------+
  |                         |
  |   x1        x2          |
  | y1+---------+           |
  |   |         |           |
  |   |BGI Text |           |
  |   |         |           |
  | y2+---------+           |
55+-------------------------+

It is strongly recommended that you specify a window inside the physical screen, so: 0 <= x1 < x2 <= 511 and 0 <= y1 < y2 <= 255 (assuming a standard 512x256 pixel screen - replace the upper bounds if you have a better graphics card, eg. QVME). Note that VG_WIND does not check the parameters (this is impossible without the Window Manager).

Default settings are x1=0, x2=511, y1=0, y2=255.

Example

VG_WIND 0,511,0,255

restores these defaults.

CROSS-REFERENCE

See also the other VG_XXX keywords. QFLIM can be used to find out about about the size of the screen if the Window Manager is loaded.