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When a control is embedded in a user control, the Validate event does not fire when you use the accelerator, and the system does not perform checking operations.
The Validate event occurs before the focus shifts to a control that has its CausesValidation property set to True. If a user control is created with a constituent control (such as a text box), and then the first control is put on a form, the Validate event of the text box fires, and then the Validate event of the user control fires when a user uses the TAB key or a click of the mouse to remove focus from the text box to a control that is directly on the form (that is, the control is not part of the user control). However, the Validate event of the text box does not fire if a user removes focus by using an accelerator key to select an external control.
This is a bug in the Visual Basic 6.0 runtime.
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Visual Studio 6.0 service pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name ------------------------------------------------------- 30-Sep-2003 01:42 126.96.36.199 1,382,400 Msvbvm60.dll 30-Sep-2003 01:42 188.8.131.52 1,891,328 Vb6.exe 30-Sep-2003 01:36 184.108.40.20653 1,696,016 Vba6.dll
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
As an example, assume that a text box is embedded in a user control, and then the user control is put on a Microsoft Visual Basic form. A Button control that is labeled OK is then added to the form outside the user control, and then the ALT+O accelerator is assigned to the Button control. If focus is then set to the text box, the Validate event of the text box does not fire if the user presses ALT+O to select OK.