jwcolby
jwcolby at colbyconsulting.com
Tue Dec 13 09:15:28 CST 2011
Wow! Obviously you need answers badly or you don't have enough paying work. ;) John W. Colby Colby Consulting Reality is what refuses to go away when you do not believe in it On 12/13/2011 9:31 AM, Jim Dettman wrote: > > The default control names may have something to do with it, but it's not > the entire answer. I just ran the code below in A2003 and was able to > create 895 controls. I tried the same code in other versions as well: > > A2000 - 800 > A2002 - 894 > A2007 - 1040 > A2010 - 1040 > > Apparently the control creation limit is not a hard limit, but based on > some other internal constraint. This is similar to the table ID limit, > which is stated as 2048, but actually floats a bit. > > These limits are somehow tied to the way Access internally handles open > objects, but what that process is is un-clear. > > Jim. > > Public Sub CheckControlCreation() > > Dim frm As Form > Dim ctlText As Control > Dim ctlLabel As Control > Dim intK As Integer > > ' Create form based on Customers form. > Set frm = CreateForm() > > For intK = 1 To 2000 > > ' Create unbound default-size text box in detail section. > Set ctlText = CreateControl(frm.Name, acTextBox, acDetail, , , 100 + > intK, 100 + intK, 200, 200) > > ' Create child label control for text box. > Set ctlLabel = CreateControl(frm.Name, acLabel, , ctlText.Name, "", 100, > 100) > > Debug.Print ctlText.Name, ctlLabel.Name > > Next intK > > End Sub > > -----Original Message----- > From: accessd-bounces at databaseadvisors.com > [mailto:accessd-bounces at databaseadvisors.com] On Behalf Of William Benson > Sent: Monday, December 12, 2011 07:37 PM > To: Access Developers discussion and problem solving > Subject: Re: [AccessD] Form Lifetime Control Limit (Was: Advice on > A2010....) > > Great explanations. Thanks Mark and Ken. > On Dec 12, 2011 6:22 PM, "Darryl Collins"<darryl at whittleconsulting.com.au> > wrote: > >> Thanks Ken, >> >> That is a good and clear explanation. >> >> Cheers >> Darryl. >> >> -----Original Message----- >> From: accessd-bounces at databaseadvisors.com [mailto: >> accessd-bounces at databaseadvisors.com] On Behalf Of Kenneth Ismert >> Sent: Tuesday, 13 December 2011 8:27 AM >> To: accessd at databaseadvisors.com >> Subject: Re: [AccessD] Form Lifetime Control Limit (Was: Advice on >> A2010....) >> >>> >>> William Benson: >>> I would love to hear MS's defense of this "lifetime" limitation.... >>> >> >> To answer the first part of your question, it all has to do with default >> control names. >> >> When you insert a control in a form, it is given a default name, like >> text10 or label121. The counter that names the controls is the Lifetime >> Control Limit counter. Once it hits 754, it gives up. >> >> The reason for that is name collisions. You can't just reset the counter, >> especially when lots of controls on the form have default names. In this >> scenario, Access might try to name a new control 'text203', and that name >> would already exist. In pathological cases, all possible new names for a >> control could already exist, and then you're stuck. >> >> That is why, in my earlier instructions, I required that you rename all >> controls with default number-suffixed names before resetting the counter. >> >> It was to avoid name collisions. >> >> So, that is the explanation for the Lifetime Control Limit. Is it stupid? >> Yes. Is it lazy? Yes. But it was Microsoft's 'quick and dirty' solution >> for what they surely imagined was going to be a rare event. >> >> -Ken >> -- >> AccessD mailing list >> AccessD at databaseadvisors.com >> http://databaseadvisors.com/mailman/listinfo/accessd >> Website: http://www.databaseadvisors.com >> >> >> >> -- >> AccessD mailing list >> AccessD at databaseadvisors.com >> http://databaseadvisors.com/mailman/listinfo/accessd >> Website: http://www.databaseadvisors.com >>