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DanRRight · Posted: Wed Aug 01, 2018 8:41 am Post subject: GET_SCREEN_BLOCK@ was removed?

My program crashed on this absent library function. Do not see it even in documentation while it is was OK just 3 years back. What's to do with this?

JohnCampbell · Joined: 16 Feb 2006 Posts: 2615 Location: Sydney

Dan,

See Appendix A. "Functions ported from DBOS"
page 429+ of clearwin.pdf (Feb 2000)

The replacement is :
CREATE_GRAPHICS_REGION@ etc.

John

DanRRight · Posted: Thu Aug 02, 2018 2:06 pm Post subject:

Thanks, John, somehow I missed two things: the change itself and the documentation notes about it.

PaulLaidler · Posted: Fri Aug 03, 2018 8:12 am Post subject:

GET_SCREEN_BLOCK@ is an old DBOS routine that can be accessed from salflibc.dll (i.e. 32 bits) because it is "hard-wired" to a Win32 replacement function.

The recommended replacement is GET_SCREEN_DIB@ which has the same arguments except that they are 32 bit values rather than 16 bit values.

GET_SCREEN_DIB@ is exported by clearwin64.dll. The Win32 replacement mentioned above is not currently exported by clearwin64.dll.

LitusSaxonicum · Posted: Sun Aug 05, 2018 10:20 am Post subject:

John,

It's simpler than that. The graphics facilities provided for DOS with the DBOS extender were completely supplanted by Clearwin+a very long time ago. I went to the launch of Clearwin, which was around 1992. A handful of the DBOS graphics routines were also provided to ease the transition. But that was a quarter century or more ago, and we move on.

There's nothing to stop someone like Dan writing a routine for himself, using the obsolete name (but without the @) which internally uses the new(er) routines. If such a person was public-spirited, they would post it on the forum!

Eddie