Announcement

Collapse

Maintenance

The forum could be offline for 30-60 minutes in the very near future for maintenance (said 3pm Pacific). I was behind on getting this notice. I do apologize.
See more
See less

COMBOBOX IN WINDOWS 2000

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • COMBOBOX IN WINDOWS 2000

    Hi,

    I have a very small app with a combobox that works perfect in windows 95 and 98 however, in windows 2000, the combobox disappears - simply non existant. Has anyone ever encountered this ?
    Thanks in advance,

    Daniel


    ------------------
    mailto:[email protected][email protected]</A>
    mailto:[email protected][email protected]</A>

  • #2
    Do you mean the whole box, or the drop-down portion? The specified height of a combo box should include the drop-down, so if you set the height for, say, 14 dialog units, there is no room within that for the drop-down to appear correctly.

    If this does not help, please describe the problem more acurately or post the code to demonstrate the problem... lots of us are using Win2K here.

    ------------------
    Lance
    PowerBASIC Support
    mailto:[email protected][email protected]</A>
    Lance
    mailto:[email protected]

    Comment


    • #3
      NT systems like Win2K are less forgiving than Win95/98. Usually, something
      in code is wrong, but Win95/98 just ignores this, where NT complains. People
      say NT is better that way, but I don't know.. Real problem is that different
      NT systems / service packs complains on different things.

      Look for errors in API calls, if any. PB's own syntax is well tested and (almost)
      never causes any problems. For me, in 100% of the cases where things have failed
      in NT but worked in Win95/98, I've done something wrong with some API call..


      ------------------

      Comment


      • #4
        As Mr Hagsten says, W2K is less forgiving.

        I had a similar problem. Turns out I created (rather, tried to create) a child window with an invalid combination of style bits (%WS_xxx and %WS_EX_xxx). On 9x the extra bits were ignored, on W2K CreateWindowEx failed and the control was not created.

        So, I'd check the style bits on your combobox; be that resource file, parameter to CreateWindow[Ex] or CONTROL ADD.

        MCM




        [This message has been edited by Michael Mattias (edited September 18, 2001).]
        Michael Mattias
        Tal Systems Inc. (retired)
        Racine WI USA
        [email protected]
        http://www.talsystems.com

        Comment


        • #5
          Thankyou so much for your quick replies guys!

          However, I can't figure out what is going wrong

          The control used to add a combobox is pretty easy and straightforward. This is what I am using in my program:

          ~~~~~~~~~~~~~~~~~~~~~

          CONTROL ADD LABEL, hDlgalignbarcodes, 030,"Section", 15, 209, 120, 12, %SS_left

          CONTROL ADD COMBOBOX, hDlgalignbarcodes, 031, , 85, 210, 65, 50,,%CBS_DROPDOWN OR %WS_VSCROLL OR %WS_TABSTOP

          FOR h& = 1 TO DATACOUNT
          COMBOBOX ADD hDlgalignbarcodes, 31, READ$(h&)
          NEXT

          DATA "Avery9999","Shelf Labels"
          ~~~~~~~~~~~~~~~~~~~~~

          Thanks in advance
          Daniel


          ------------------
          mailto:[email protected][email protected]</A>
          mailto:[email protected][email protected]</A>

          Comment


          • #6
            50,,%CBS_DROPDOWN Should be one one comma only.



            [This message has been edited by Semen Matusovski (edited September 18, 2001).]

            Comment


            • #7
              Thanks for your reply !

              I shall try it tomorrow morning because I am not on my dev. Pc and tell you how things went.

              Daniel

              ------------------
              mailto:[email protected][email protected]</A>
              mailto:[email protected][email protected]</A>

              Comment


              • #8
                thank you SO MUCH Lance, Borje, Michael and Semen. I was not aware of this however this certainly did the trick for me!! Thanks once again. Best Regards, Daniel

                ------------------
                mailto:[email protected][email protected]</A>
                mailto:[email protected][email protected]</A>

                Comment


                • #9
                  Trick ? It's simply correct variant.
                  From Pb/Dll help:
                  Code:
                  CONTROL ADD COMBOBOX, hDlg&, id&, [items$()], x, y, xx, yy, [, style&[, exstyle&]] [CALL callbackfunction]
                  
                  style& Style of the control.  This value can be a combination of any values below:
                  %CBS_DROPDOWN ...
                  
                  exstyle&   Extended style of the control.  This value can be a combination of any values below: ...
                  Because you used two commas, compiler interpretates %CBS_DROPDOWN in your variant as exstyle.
                  Meanwhile exstyle and style are two different animals.

                  ------------------
                  E-MAIL: [email protected]

                  Comment


                  • #10
                    Er... Semen, you posted the syntax definition, but with 2 comma's too!

                    The correct syntax should be shown as:
                    Code:
                    CONTROL ADD COMBOBOX, hDlg&, id&, [items$()], x, y, xx, yy [, [style&] 
                        [, [exstyle&]]] [[,] CALL callbackfunc]
                    ------------------
                    Lance
                    PowerBASIC Support
                    mailto:[email protected][email protected]</A>
                    Lance
                    mailto:[email protected]

                    Comment


                    • #11
                      Lance --
                      Actually I simply copied from "Help" and didn't read.
                      Now is clear a reason of Daniel's mistake.

                      ------------------
                      E-MAIL: [email protected]

                      Comment

                      Working...
                      X