How to get fast window print in VB/DOS?

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3 total messages Started by Peter G. Millard Sun, 08 Nov 1992 05:36

#217

Author: Peter G. Millard
Date: Sun, 08 Nov 1992 05:36

26 lines
1726 bytes

I am having some trouble w.r.t. to the screen print rate of my compiled
VB/DOS programs..I was wondering if anybody had a good solution to my
problem.  Here is my situation

I am writing a program which get data from a counter card, converts
it to a usable quantity and prints it to a picture window in extra large 
numbers. I am using subroutines (gosub type, not CALL type) to print the
numbers to the screen. These subs in-turn print the numbers by setting 
the currentX and currentY paramters for my picture box, then printing one
of the extended characters (like chr$(201)) to that location. 

The problem I have is that I need the program to update the screen as 
fast as possible. I used the same technique (sp?) in a QB 4.5 program 
(using LOCATE and then PRINT CHR$()) and these method is extremely faster.

I was wondering if there would be a faster method of printing my large numbers
to the picture box or am I doing this the hard way or what?? 

Any help would be appreciated.
Thanx.
  
-- 
******************************************************************************
	Peter G. Millard  *  INTERNET: v057n5um@ubvms.cc.buffalo.edu           
 	SUNY @ Buffalo    *          : millard@acsu.buffalo.edu
*****************************************************************************

Re: How to get fast window print in VB/DOS?

#227

Author: Steven Podradchik
Date: Mon, 09 Nov 1992 19:36

5 lines
591 bytes

You should get approximately the same print rate when printing to a
form via the Print method as printing to a standard DOS screen with the
Print statement.  Could you post some of the code you're using?

Thanks, Steve Podradchik (MS)

Re: How to get fast window print in VB/DOS?

#229

Author: Peter G. Millard
Date: Tue, 10 Nov 1992 04:13

45 lines
1929 bytes

stevepo@microsoft.com (Steven Podradchik) writes:

>You should get approximately the same print rate when printing to a
>form via the Print method as printing to a standard DOS screen with the
>Print statement.  Could you post some of the code you're using?

>Thanks, Steve Podradchik (MS)

here is some sample code...the draw2 routine draws the number 2 on the 
screen using the h & v variables which specify it's starting position.
I am using the SUB LCATE to clean up the code write now. Might this be
slowing down the execution?

I pass the horizontal & vertical positions and what character to print.

draw2:
FOR t = 1 TO 5:
    lcate h + t, v, CHR$(205)
NEXT t
lcate h + 6, v, CHR$(187)
lcate h + 6, v + 1, CHR$(186)
lcate h + 6, v + 2, CHR$(188)
FOR t = 2 TO 5: lcate h + t, v + 2, CHR$(205): NEXT t
lcate h + 1, v + 2, CHR$(201)
lcate h + 1, v + 3, CHR$(186)
lcate h + 1, v + 4, CHR$(200)
FOR t = 2 TO 6:
    lcate h + t, v + 4, CHR$(205):
NEXT t:
RETURN

SUB lcate (x, y, x$)
Rdscrn.disp.CurrentX = x
Rdscrn.disp.CurrentY = y
Rdscrn.disp.PRINT x$
END SUB


Thanx for any additional info which anyone can provide.

-- 
******************************************************************************
	Peter G. Millard  *  INTERNET: v057n5um@ubvms.cc.buffalo.edu           
 	SUNY @ Buffalo    *          : millard@acsu.buffalo.edu
*****************************************************************************

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