DOCUMENT:Q149097 11-JAN-2001 [vbwin] TITLE :BUG: Data Control Validate Event Not Fired on Unloading Form PRODUCT :Microsoft Visual Basic for Windows PROD/VER:4.00 | 4.00 OPER/SYS: KEYWORDS:kbbuglist ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual Basic Standard Edition, 32-bit, for Windows, version 4.0 - Microsoft Visual Basic Professional Edition, 16-bit, for Windows, version 4.0 - Microsoft Visual Basic Professional Edition, 32-bit, for Windows, version 4.0 - Microsoft Visual Basic Enterprise Edition, 16-bit, for Windows, version 4.0 - Microsoft Visual Basic Enterprise Edition, 32-bit, for Windows, version 4.0 ------------------------------------------------------------------------------- SYMPTOMS ======== A form containing a bound Data Control disables the Validate event when the form is unloaded. STATUS ====== Microsoft has confirmed this to be an issue in the Microsoft products listed at the beginning of this article. Microsoft is researching this issue and will post new information here in the Microsoft Knowledge Base as it becomes available. MORE INFORMATION ================ The following are steps to reproduce this behavior. The Cancel property is set to true in the Unload event of the form to prevent the form from unloading. When you edit a record and then unload the form, the validate event, containing a beep instruction, executes only one more time. Steps to Reproduce Behavior --------------------------- 1. Start 16-bit or 32-bit Visual Basic 4.0, or if it is already running, click New Project on the File menu. 2. Add the following controls and set the following properties: Control Default Name Property Value -------------------------------------------------------------------- Data Control Data1 Database Name BIBLIO.MDB RecordSource Authors TextBox Control Text1 DataSource Data1 DataField Author Command Button Command1 3. Copy the following code to the Code window of the Form1 form: Option Explicit Private Sub Command1_Click() Unload Me End Sub Private Sub Data1_Validate(Action As Integer, Save As Integer) Beep End Sub Private Sub Form_Unload(Cancel As Integer) 'The next line stops the form from being unloaded Cancel = True End Sub 4. On the Run menu, click Start or press the F5 key to start the program. Scroll through the records and click the command button. Note that a beep occurs with each action. 5. Edit a record and click the command button. Scroll through the records and note the a beep occurs only once. Scrolling through the records or clicking the command button does not execute the Validate event. Additional query words: 4.00 vb4win vb4all ====================================================================== Keywords : kbbuglist Technology : kbVBSearch kbAudDeveloper kbVB400Search kbVB400 kbVB16bitSearch Version : 4.00 | 4.00 Issue type : kbbug ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.