Article ID: 130387
Article Last Modified on 2/11/2000
APPLIES TO
- Microsoft Visual FoxPro 3.0 Standard Edition
This article was previously published under Q130387
SYMPTOMS
A modal form is run from a program with a DO FORM command followed by a READ EVENTS. A command button on the form has the following method in its Click event:
RELEASE THISFORM
CLEAR EVENTS
When the button is clicked, the form is released but the READ EVENTS is not cleared.
CAUSE
When a modal form is displayed, execution of a program is suspended. Modal forms do not require a READ EVENTS. In the case described in this article, the READ EVENTS command has not yet been executed when the CLEAR EVENTS is issued. Program execution is suspended.
RESOLUTION
Do not use the READ EVENTS command if you have a modal form or form set. To verify the modality of your form, check the value of the WindowType property. When a form is modal, the WindowType property is equal to 1. For more information about displaying modal forms or form sets, search for the WINDOWTYPE property or the SHOW method in the Visual FoxPro Help menu.
STATUS
This behavior is by design.
MORE INFORMATION
Steps to Reproduce Behavior
The following sample code displays a modal form. When the form is displayed and the command button is clicked, the form is released, but control does not return to the Command window. To correct this sample, remove the READ EVENTS and CLEAR EVENTS commands from the code.
omyform=CREATEOBJECT('myform')
omyform.Show(1) && Displays a modal form
READ EVENTS
DEFINE CLASS myform AS form
WindowType=0
ADD OBJECT mycmd AS CommandButton
PROCEDURE mycmd.Click
RELEASE Thisform
CLEAR EVENTS
ENDPROC
ENDDEFINE
Additional query words: VFoxWin
Keywords: KB130387
