Megosztás a következőn keresztül:

SYS(602) - Bitmap Configuration

  • Cikk

Returns the current setting of the bitmap in the current configuration file and turns off-screen bitmaps off or on at run time.

SYS(602 [, 0 | 1 ])

Parameters

  • 0
    Turns off off-screen bitmaps at run time.
  • 1
    Turns on off-screen bitmaps at run time.

Return Values

Character data type. The following table lists the possible settings that SYS(602) can return.

Return value Setting
0 Off-screen bitmaps are turned off.
1 Off-screen bitmaps are turned on. (Default)

Remarks

You can use off-screen bitmaps to store an image of the current desktop and forms so that you can render them if another element, such as a window, is drawn over them. However, off-screen bitmaps use a lot of memory, so you can improve performance on Terminal Server applications by turning these bitmaps off using SYS(602).

However, be aware that toggling off-screen bitmaps can affect your application. For example, form controls can appear normal, however, writing directly to a form using a method such as Line requires off-screen bitmaps to be turned on.

If you want to determine whether an application is running on a Terminal Server, use OS(10).

See Also

SYS( ) Functions Overview | OS( ) Function | Special Terms for Configuration Files