Microsoft Visual C++/VC++, enable and disable command buttons

enable and disable command buttons

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GREP #1 / 2	enable and disable command buttons I have a dialog-based application, and I want to be able to enable / disable some of the controls on the dialog while it's displayed. (disable the first record and previous record buttons, for example, when the database is already at the first record). I created control variables for the buttons I want to disable, and then a member fxn like this: CADOdlg::DoControlStates() { m_cmdFirstRecord.EnableWindow( ! isBOF); ... Quote: } The controls don't disable, however. Funny thing, is that if, in OnInitDialog() I call EnableWindow(false); for a particular control, the control IS disabled, but it doesn't seem to work once the dialog is displayed. I am assuming that I need to do something else to cause the window to update its buttons. I have tried calling Validate() and CADOdlg::UpdateControls() to no avail. Do I need to use something like an ON_UPDATE_UI handler and then force an update? (and if so, how?) Thanks.
Fri, 02 Jul 2004 12:27:09 GMT

Felix Wu( #2 / 2	enable and disable command buttons Does the disabled button still accept mouse click? Where is the button located? The following article is for your reference: HOWTO: How To Disable Push Buttons on a DialogBar in MFC (Q152376) http://support.microsoft.com/support/kb/articles/Q152/3/76.asp Regards, Felix Wu ============= This posting is provided "AS IS" with no warranties, and confers no rights. Need quick answers to questions like these? The Microsoft Knowledge Base provides a wealth of information that you can use to troubleshoot a problem or answer a question! It's located at http://support.microsoft.com/support/c.asp?M=F>. -------------------- Quote: >Newsgroups: microsoft.public.vc.ide_general,microsoft.public.vc.events >Subject: enable and disable command buttons >X-Newsreader: Forte Agent 1.8/32.548 >MIME-Version: 1.0 >Content-Type: text/plain; charset=us-ascii >Content-Transfer-Encoding: 7bit >Lines: 21 >X-Abuse-Info: Please be sure to forward a copy of ALL headers >X-Abuse-Info: Otherwise we will be unable to process your complaint properly. >NNTP-Posting-Date: Sun, 13 Jan 2002 23:23:47 EST >Organization: Bellsouth.Net >Date: Sun, 13 Jan 2002 23:27:09 -0500 >Path: cpmsftngxa07!tkmsftngp01!newsfeed00.sul.t-online.de!t-online.de!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!hub1.nntpserver.com!peer1- sjc1.usenetserver.com!fs01-sjc1.usenetserver.com!usenetserver.com!filter.west.usenetserver.com!filter.usenetserver.com!e3500-atl2.usenetserver.com.POSTED! 53ab2750!not-for-mail - Hide quoted text - - Show quoted text - Quote: >Xref: cpmsftngxa07 microsoft.public.vc.events:4833 microsoft.public.vc.ide_general:20128 >X-Tomcat-NG: microsoft.public.vc.ide_general >I have a dialog-based application, and I want to be able to enable / >disable some of the controls on the dialog while it's displayed. >(disable the first record and previous record buttons, for example, >when the database is already at the first record). I created control >variables for the buttons I want to disable, and then a member fxn >like this: >CADOdlg::DoControlStates() >{ > m_cmdFirstRecord.EnableWindow( ! isBOF); > ... >} >The controls don't disable, however. Funny thing, is that if, in >OnInitDialog() I call EnableWindow(false); for a particular control, >the control IS disabled, but it doesn't seem to work once the dialog >is displayed. I am assuming that I need to do something else to cause >the window to update its buttons. I have tried calling Validate() and >CADOdlg::UpdateControls() to no avail. Do I need to use something >like an ON_UPDATE_UI handler and then force an update? (and if so, >how?) Thanks.
Sun, 04 Jul 2004 12:02:20 GMT

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