PRB: Form's KeyPress Is Not Fired When ActiveX Control Has Focus (200266)


The information in this article applies to:

  • Microsoft Visual FoxPro for Windows 3.0
  • Microsoft Visual FoxPro for Windows 3.0b
  • Microsoft Visual FoxPro for Windows 5.0
  • Microsoft Visual FoxPro for Windows 5.0a
  • Microsoft Visual FoxPro for Windows 6.0
  • Microsoft Visual FoxPro for Windows 7.0
This article was previously published under Q200266

SYMPTOMS

You have a form with code in the KeyPress event and the KeyPreview property is set to true (.T.). When an ActiveX control has focus, the KeyPress event of the form does not fire.

CAUSE

The KeyPress event for many ActiveX controls happens to have the same name as the Visual FoxPro native KeyPress event. ActiveX controls on Visual FoxPro forms also have their own window. As a result, they handle the KeyPress event independently of Visual FoxPro.

RESOLUTION

In the KeyPress of the ActiveX control, add the following code as the first line of the event: 
ThisForm.KeyPress

STATUS

This behavior is by design.

MORE INFORMATION

Steps to Reproduce Behavior

  1. Create a new form with a command button and an ActiveX control. Use an ActiveX control with a KeyPress event, such as the Calendar control. Set the KeyPreview property of the form to .T. (true).
  2. Add the following code to the following events (assumes default object names are used). When finished, save and run the form.
    • Form1.KeyPress:
      WAIT WINDOW "Form" TIMEOUT 1
    • Command1.KeyPress:
      WAIT WINDOW "Button" TIMEOUT 1
    • Olecontrol1.KeyPress:
      WAIT WINDOW "control" TIMEOUT 1
  3. With the form running, set focus to the command button and press any key. Watch the Wait windows in the upper right-hand corner of the screen. Note that the KeyPress event of the form fires before that of the command button.
  4. Set focus to the ActiveX control and press any key. The form's KeyPress event does not fire, but the control's KeyPress event does.
Modification Type:MajorLast Reviewed:5/12/2003
Keywords:kbBug kbCodeSnippet kbCtrl kbnofix kbprb KB200266 kbAudDeveloper
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